E-mail:gzliang@cqu.edu.cn    Tel: (86)2365102507

List of peptide properties
DFBP ID - DFBPACEI1826(ACE-inhibitory peptide)
DFBP ID DFBPACEI1826
Peptide sequence PIW
Type Native peptide
Peptide/Function name ACE-inhibitory peptide
Function-activity relationship
Main bioactivity ACE-inhibitory activity
Otheir bioactivity N.D
Calculated physicochemical properties
Three-letter amino acid Pro-Ile-Trp
Single-letter amino acid PIW
Peptide length 3
Peptide mass
Experimental mass Theoretical mass
414 Da 414.50 Da c
Net charge 0.00 c
Isoelectric point (pI) 5.97 c
IC50 590 ± 20 μM
pIC50 -2.771
GRAVY 0.6667 c
Hydrophilic residue ratio 100% c
Peptide calculator
To calculate the physicochemical properties of bioactive peptide.
Peptide source & Food-borne protein(s) search
Classification Plant
Organism/Source Chlorella vulgaris (C. vulgaris)
Precursor protein Photosystem II protein D1 (P56318); Heat shock protein 90 (M4HPI0)
Residue position N.D
Precursor protein(s) search
Source.1: DFBPPR0810 ---- Plant proteins ---- APETALA2-like protein 1
Source.2: DFBPPR0951 ---- Plant proteins ---- Calpain-type cysteine protease ADL1
Source.3: DFBPPR0973 ---- Plant proteins ---- Polyamine oxidase 7
Source.4: DFBPPR0995 ---- Plant proteins ---- Transcription factor TDR
Source.5: DFBPPR1006 ---- Plant proteins ---- Cellulose synthase A catalytic subunit 4 [UDP-forming]
Source.6: DFBPPR1086 ---- Plant proteins ---- Zinc finger CCCH domain-containing protein 46
Source.7: DFBPPR1144 ---- Plant proteins ---- Meiotic recombination protein SPO11-4
Source.8: DFBPPR1161 ---- Plant proteins ---- Photosystem II protein D1
Source.9: DFBPPR1277 ---- Plant proteins ---- Probable cellulose synthase A catalytic subunit 8 [UDP-forming]
Source.10: DFBPPR1369 ---- Plant proteins ---- Probable cellulose synthase A catalytic subunit 1 [UDP-forming]
Source.11: DFBPPR1452 ---- Plant proteins ---- Probable cellulose synthase A catalytic subunit 2 [UDP-forming]
Source.12: DFBPPR1544 ---- Plant proteins ---- Protein disulfide isomerase-like 2-3
Source.13: DFBPPR1817 ---- Plant proteins ---- Heat shock protein 81-3
Source.14: DFBPPR1998 ---- Plant proteins ---- Probable pyruvate, phosphate dikinase regulatory protein, chloroplastic
Source.15: DFBPPR2107 ---- Plant proteins ---- Probable sucrose-phosphate synthase 1
Source.16: DFBPPR2142 ---- Plant proteins ---- Probable sucrose-phosphate synthase 4
Source.17: DFBPPR2268 ---- Plant proteins ---- Probable glucomannan 4-beta-mannosyltransferase 7
Source.18: DFBPPR2282 ---- Plant proteins ---- Heat shock protein 81-1
Source.19: DFBPPR2334 ---- Plant proteins ---- Probable sucrose-phosphate synthase 5
Source.20: DFBPPR2346 ---- Plant proteins ---- Probable tocopherol cyclase, chloroplastic
Source.21: DFBPPR2378 ---- Plant proteins ---- Probable sucrose-phosphate synthase 2
Source.22: DFBPPR2499 ---- Plant proteins ---- Probable glucomannan 4-beta-mannosyltransferase 5
Source.23: DFBPPR2542 ---- Plant proteins ---- Heat shock protein 81-2
Source.24: DFBPPR2581 ---- Plant proteins ---- Polyamine oxidase 6
Source.25: DFBPPR2691 ---- Plant proteins ---- Achilleol B synthase
Source.26: DFBPPR2785 ---- Plant proteins ---- Aspartic proteinase
Source.27: DFBPPR2821 ---- Plant proteins ---- ABC transporter G family member 35
Source.28: DFBPPR2828 ---- Plant proteins ---- ABC transporter G family member 36
Source.29: DFBPPR2845 ---- Plant proteins ---- ABC transporter G family member 47
Source.30: DFBPPR2846 ---- Plant proteins ---- ABC transporter G family member 46
Source.31: DFBPPR2961 ---- Plant proteins ---- Probable serine acetyltransferase 2
Source.32: DFBPPR2969 ---- Plant proteins ---- Probable xyloglucan glycosyltransferase 3
Source.33: DFBPPR3018 ---- Plant proteins ---- Molybdopterin synthase catalytic subunit
Source.34: DFBPPR3074 ---- Plant proteins ---- ABC transporter G family member 53
Source.35: DFBPPR3097 ---- Plant proteins ---- ABC transporter G family member 48
Source.36: DFBPPR3106 ---- Plant proteins ---- Protein HIRA
Source.37: DFBPPR3119 ---- Plant proteins ---- ABC transporter G family member 39
Source.38: DFBPPR3185 ---- Plant proteins ---- Acyl transferase 10
Source.39: DFBPPR3226 ---- Plant proteins ---- Proline transporter 1
Source.40: DFBPPR3360 ---- Plant proteins ---- Cycloartenol synthase
Source.41: DFBPPR3423 ---- Plant proteins ---- ABC transporter G family member 40
Source.42: DFBPPR3456 ---- Plant proteins ---- Maturase K
Source.43: DFBPPR3506 ---- Plant proteins ---- Growth-regulating factor 12
Source.44: DFBPPR3532 ---- Plant proteins ---- Probable RNA-dependent RNA polymerase 4
Source.45: DFBPPR3536 ---- Plant proteins ---- Putative auxin transporter-like protein 4
Source.46: DFBPPR3540 ---- Plant proteins ---- Auxin transporter-like protein 2
Source.47: DFBPPR3610 ---- Plant proteins ---- Auxin transporter-like protein 1
Source.48: DFBPPR3630 ---- Plant proteins ---- Probable anion transporter 6
Source.49: DFBPPR3715 ---- Plant proteins ---- Auxin transporter-like protein 3
Source.50: DFBPPR3802 ---- Plant proteins ---- Dehydration-responsive element-binding protein 2E
Source.51: DFBPPR3878 ---- Plant proteins ---- Growth-regulating factor 10
Source.52: DFBPPR3900 ---- Plant proteins ---- Growth-regulating factor 11
Source.53: DFBPPR4097 ---- Plant proteins ---- Trafficking protein particle complex II-specific subunit 130 homolog
Source.54: DFBPPR4130 ---- Plant proteins ---- Two-component response regulator-like PRR95
Source.55: DFBPPR4370 ---- Plant proteins ---- Glucose and ribitol dehydrogenase homolog
Source.56: DFBPPR4492 ---- Plant proteins ---- Ammonium transporter 3 member 2
Source.57: DFBPPR4586 ---- Plant proteins ---- Protein MEI2-like 2
Source.58: DFBPPR4826 ---- Plant proteins ---- Probable protein transport Sec1a
Source.59: DFBPPR4831 ---- Plant proteins ---- Zinc finger CCCH domain-containing protein 36
Source.60: DFBPPR4993 ---- Plant proteins ---- Photosystem II protein D1
Source.61: DFBPPR5008 ---- Plant proteins ---- Methylcrotonoyl-CoA carboxylase subunit alpha, mitochondrial
Source.62: DFBPPR5039 ---- Plant proteins ---- Catalase-1/2
Source.63: DFBPPR5074 ---- Plant proteins ---- Phytochrome B
Source.64: DFBPPR5082 ---- Plant proteins ---- Catalase-4
Source.65: DFBPPR5086 ---- Plant proteins ---- Catalase-3
Source.66: DFBPPR5381 ---- Plant proteins ---- Polyamine oxidase 1
Source.67: DFBPPR5387 ---- Plant proteins ---- Calpain-type cysteine protease DEK1
Source.68: DFBPPR5394 ---- Plant proteins ---- Photosystem II protein D1
Source.69: DFBPPR5601 ---- Plant proteins ---- Protein HIRA
Source.70: DFBPPR5699 ---- Plant proteins ---- Sucrose-phosphate synthase
Source.71: DFBPPR5826 ---- Plant proteins ---- Heat shock protein 82
Source.72: DFBPPR6018 ---- Plant proteins ---- Probable tocopherol cyclase, chloroplastic
Source.73: DFBPPR6220 ---- Plant proteins ---- Photosystem II protein D1
Source.74: DFBPPR6260 ---- Plant proteins ---- Delta(24)-sterol reductase
Source.75: DFBPPR6648 ---- Plant proteins ---- Photosystem II protein D1
Source.76: DFBPPR6882 ---- Plant proteins ---- Maturase K
Source.77: DFBPPR7023 ---- Plant proteins ---- Photosystem II protein D1
Source.78: DFBPPR7170 ---- Plant proteins ---- Maturase K
Source.79: DFBPPR7401 ---- Plant proteins ---- Photosystem II protein D1
Source.80: DFBPPR7744 ---- Plant proteins ---- Maturase K
Source.81: DFBPPR8202 ---- Plant proteins ---- 16 kDa phloem protein 2
Source.82: DFBPPR8370 ---- Plant proteins ---- Maturase K
Source.83: DFBPPR8452 ---- Plant proteins ---- Photosystem II protein D1
Source.84: DFBPPR16003 ---- Animal proteins ---- Sodium/calcium exchanger 1
Source.85: DFBPPR16045 ---- Animal proteins ---- Endoplasmin
Source.86: DFBPPR16063 ---- Animal proteins ---- Receptor tyrosine-protein kinase erbB-2
Source.87: DFBPPR16144 ---- Animal proteins ---- Tight junction protein ZO-3
Source.88: DFBPPR16184 ---- Animal proteins ---- C5a anaphylatoxin chemotactic receptor 1
Source.89: DFBPPR16259 ---- Animal proteins ---- Galactocerebrosidase
Source.90: DFBPPR16778 ---- Animal proteins ---- Prolactin receptor
Source.91: DFBPPR16884 ---- Animal proteins ---- Sodium/calcium exchanger 1
Source.92: DFBPPR16932 ---- Animal proteins ---- Heat shock protein HSP 90-beta
Source.93: DFBPPR17050 ---- Animal proteins ---- Heat shock protein HSP 90-alpha
Source.94: DFBPPR17228 ---- Animal proteins ---- Lanosterol synthase
Source.95: DFBPPR17322 ---- Animal proteins ---- Lysyl oxidase homolog 2
Source.96: DFBPPR17325 ---- Animal proteins ---- Macrophage scavenger receptor types I and II
Source.97: DFBPPR17348 ---- Animal proteins ---- 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-1
Source.98: DFBPPR17460 ---- Animal proteins ---- Endoplasmin
Source.99: DFBPPR17513 ---- Animal proteins ---- 3-hydroxy-3-methylglutaryl-coenzyme A reductase
Source.100: DFBPPR17551 ---- Animal proteins ---- Telomeric repeat-binding factor 2-interacting protein 1
Source.101: DFBPPR18119 ---- Animal proteins ---- Synaptic vesicular amine transporter
Source.102: DFBPPR18120 ---- Animal proteins ---- Synaptic vesicular amine transporter
Source.103: DFBPPR18190 ---- Animal proteins ---- Serine/threonine-protein kinase 25
Source.104: DFBPPR18298 ---- Animal proteins ---- Glucose-6-phosphatase
Source.105: DFBPPR18510 ---- Animal proteins ---- Myogenic factor 5
Source.106: DFBPPR18517 ---- Animal proteins ---- Scavenger receptor cysteine-rich type 1 protein M130
Source.107: DFBPPR18699 ---- Animal proteins ---- Lysyl oxidase homolog 4
Source.108: DFBPPR18786 ---- Animal proteins ---- Bis(5'-adenosyl)-triphosphatase ENPP4
Source.109: DFBPPR18938 ---- Animal proteins ---- C-X-C chemokine receptor type 2
Source.110: DFBPPR18988 ---- Animal proteins ---- Lysosomal Pro-X carboxypeptidase
Source.111: DFBPPR19062 ---- Animal proteins ---- Protein farnesyltransferase subunit beta
Source.112: DFBPPR19071 ---- Animal proteins ---- Collectrin
Source.113: DFBPPR19181 ---- Animal proteins ---- Solute carrier family 25 member 33
Source.114: DFBPPR19195 ---- Animal proteins ---- V-type proton ATPase 116 kDa subunit a2
Source.115: DFBPPR19221 ---- Animal proteins ---- Rabphilin-3A
Source.116: DFBPPR19482 ---- Animal proteins ---- Ubiquitin-conjugating enzyme E2 Q2
Source.117: DFBPPR19674 ---- Animal proteins ---- Nuclear transport factor 2
Source.118: DFBPPR19738 ---- Animal proteins ---- Translocator protein
Source.119: DFBPPR19780 ---- Animal proteins ---- Molybdopterin synthase catalytic subunit
Source.120: DFBPPR19890 ---- Animal proteins ---- Protein N-terminal glutamine amidohydrolase
Source.121: DFBPPR19988 ---- Animal proteins ---- Ubiquitin carboxyl-terminal hydrolase MINDY-3
Source.122: DFBPPR20302 ---- Animal proteins ---- General transcription factor IIH subunit 3
Source.123: DFBPPR20483 ---- Animal proteins ---- Thioredoxin-related transmembrane protein 1
Source.124: DFBPPR20612 ---- Animal proteins ---- Dolichol kinase
Source.125: DFBPPR20694 ---- Animal proteins ---- Sodium- and chloride-dependent creatine transporter 1
Source.126: DFBPPR20700 ---- Animal proteins ---- General transcription factor IIE subunit 1
Source.127: DFBPPR20706 ---- Animal proteins ---- Chloride channel CLIC-like protein 1
Source.128: DFBPPR20779 ---- Animal proteins ---- Myelin regulatory factor-like protein
Source.129: DFBPPR20812 ---- Animal proteins ---- SEC14-like protein 2
Source.130: DFBPPR21096 ---- Animal proteins ---- Kinesin light chain 4
Source.131: DFBPPR21098 ---- Animal proteins ---- Pre T-cell antigen receptor alpha
Source.132: DFBPPR21222 ---- Animal proteins ---- Cytosolic carboxypeptidase 3
Source.133: DFBPPR21235 ---- Animal proteins ---- Transmembrane protein 231
Source.134: DFBPPR21248 ---- Animal proteins ---- 39S ribosomal protein L4, mitochondrial
Source.135: DFBPPR21325 ---- Animal proteins ---- Translocon-associated protein subunit gamma
Source.136: DFBPPR21488 ---- Animal proteins ---- Probable ubiquitin carboxyl-terminal hydrolase MINDY-4
Source.137: DFBPPR21802 ---- Animal proteins ---- Antigen WC1.1
Source.138: DFBPPR21955 ---- Animal proteins ---- Calcium-responsive transcription factor
Source.139: DFBPPR22232 ---- Animal proteins ---- Transmembrane protein 176A
Source.140: DFBPPR22302 ---- Animal proteins ---- Protein angel homolog 2
Source.141: DFBPPR22355 ---- Animal proteins ---- Glutamine-rich protein 1
Source.142: DFBPPR22360 ---- Animal proteins ---- Mitochondrial fission regulator 1-like
Source.143: DFBPPR22383 ---- Animal proteins ---- Transmembrane protein 185B
Source.144: DFBPPR22432 ---- Animal proteins ---- Protein FAM124B
Source.145: DFBPPR22463 ---- Animal proteins ---- T-complex protein 11-like protein 2
Source.146: DFBPPR22572 ---- Animal proteins ---- Maestro heat-like repeat-containing protein family member 1
Source.147: DFBPPR22577 ---- Animal proteins ---- Uncharacterized protein C12orf31 homolog
Source.148: DFBPPR8588 ---- Animal proteins ---- Leptin
Source.149: DFBPPR8742 ---- Animal proteins ---- Low-density lipoprotein receptor-related protein 2
Source.150: DFBPPR8786 ---- Animal proteins ---- Heat shock protein HSP 90-alpha
Source.151: DFBPPR8896 ---- Animal proteins ---- Heat-stable enterotoxin receptor
Source.152: DFBPPR9121 ---- Animal proteins ---- Endoplasmin
Source.153: DFBPPR9204 ---- Animal proteins ---- T-cell surface glycoprotein CD1a
Source.154: DFBPPR9215 ---- Animal proteins ---- Phosphomevalonate kinase
Source.155: DFBPPR9703 ---- Animal proteins ---- Membrane-associated transporter protein
Source.156: DFBPPR9784 ---- Animal proteins ---- Translocator protein
Source.157: DFBPPR9836 ---- Animal proteins ---- Forkhead box protein N3
Source.158: DFBPPR10055 ---- Animal proteins ---- Protein Wnt-3a
Source.159: DFBPPR10077 ---- Animal proteins ---- Heat shock protein HSP 90-alpha
Source.160: DFBPPR10213 ---- Animal proteins ---- Glycerophosphodiester phosphodiesterase domain-containing protein 5
Source.161: DFBPPR10290 ---- Animal proteins ---- Trifunctional purine biosynthetic protein adenosine-3
Source.162: DFBPPR10294 ---- Animal proteins ---- Transcription factor VBP
Source.163: DFBPPR10297 ---- Animal proteins ---- Vitellogenin-2
Source.164: DFBPPR10432 ---- Animal proteins ---- Endoplasmin
Source.165: DFBPPR10458 ---- Animal proteins ---- Neurofascin
Source.166: DFBPPR10488 ---- Animal proteins ---- Sulfite oxidase
Source.167: DFBPPR10524 ---- Animal proteins ---- Protein disulfide-isomerase
Source.168: DFBPPR10958 ---- Animal proteins ---- Heat shock cognate protein HSP 90-beta
Source.169: DFBPPR10990 ---- Animal proteins ---- Period circadian protein homolog 2
Source.170: DFBPPR11013 ---- Animal proteins ---- Band 3 anion transport protein
Source.171: DFBPPR11053 ---- Animal proteins ---- Alpha-1,6-mannosyl-glycoprotein 4-beta-N-acetylglucosaminyltransferase
Source.172: DFBPPR11418 ---- Animal proteins ---- Transmembrane protein 231
Source.173: DFBPPR11530 ---- Animal proteins ---- Probable cation-transporting ATPase 13A4
Source.174: DFBPPR11553 ---- Animal proteins ---- V-type proton ATPase 116 kDa subunit a1
Source.175: DFBPPR11622 ---- Animal proteins ---- Ammonium transporter Rh type C
Source.176: DFBPPR11823 ---- Animal proteins ---- Solute carrier family 25 member 36
Source.177: DFBPPR11964 ---- Animal proteins ---- Protein LLP homolog
Source.178: DFBPPR12087 ---- Animal proteins ---- Transmembrane protein 121
Source.179: DFBPPR12099 ---- Animal proteins ---- tRNA (guanine(10)-N2)-methyltransferase homolog
Source.180: DFBPPR12136 ---- Animal proteins ---- Protein PHTF2
Source.181: DFBPPR12237 ---- Animal proteins ---- Thyroid adenoma-associated protein homolog
Source.182: DFBPPR12407 ---- Animal proteins ---- Heat shock protein HSP 90-beta
Source.183: DFBPPR12480 ---- Animal proteins ---- Heat shock protein HSP 90-alpha
Source.184: DFBPPR12528 ---- Animal proteins ---- 3-hydroxy-3-methylglutaryl-coenzyme A reductase
Source.185: DFBPPR12548 ---- Animal proteins ---- C5a anaphylatoxin chemotactic receptor 1
Source.186: DFBPPR12710 ---- Animal proteins ---- Endoplasmin
Source.187: DFBPPR12742 ---- Animal proteins ---- Ubiquitin-conjugating enzyme E2 Q2
Source.188: DFBPPR12819 ---- Animal proteins ---- C-X-C chemokine receptor type 2
Source.189: DFBPPR12937 ---- Animal proteins ---- Zonadhesin
Source.190: DFBPPR13091 ---- Animal proteins ---- Cortactin-binding protein 2
Source.191: DFBPPR13147 ---- Animal proteins ---- Heat shock protein HSP 90-beta
Source.192: DFBPPR13189 ---- Animal proteins ---- Heat shock protein HSP 90-alpha
Source.193: DFBPPR13826 ---- Animal proteins ---- Translocator protein
Source.194: DFBPPR14006 ---- Animal proteins ---- Acyl-CoA desaturase
Source.195: DFBPPR14122 ---- Marine protein ---- Galactocerebrosidase
Source.196: DFBPPR14286 ---- Marine protein ---- Photosystem II protein D1
Source.197: DFBPPR14329 ---- Marine protein ---- Photosystem II protein D1
Source.198: DFBPPR14683 ---- Marine protein ---- Ammonium transporter Rh type C
Source.199: DFBPPR14752 ---- Marine protein ---- Proclotting enzyme
Source.200: DFBPPR14802 ---- Marine protein ---- Glutamine synthetase
Source.201: DFBPPR14925 ---- Microorganism protein ---- 3-isopropylmalate dehydrogenase
Source.202: DFBPPR14940 ---- Microorganism protein ---- CCR4-Not complex 3'-5'-exoribonuclease subunit Ccr4
Source.203: DFBPPR14982 ---- Microorganism protein ---- Cytochrome P450 monooxygenase PUL2
Source.204: DFBPPR15123 ---- Microorganism protein ---- JmjC domain-containing histone demethylation protein 1
Source.205: DFBPPR15271 ---- Microorganism protein ---- Actin-related protein 4
Source.206: DFBPPR15291 ---- Microorganism protein ---- mRNA-capping enzyme subunit beta
Source.207: DFBPPR15329 ---- Microorganism protein ---- GPI mannosyltransferase 2
Source.208: DFBPPR15524 ---- Microorganism protein ---- COP9 signalosome complex subunit 10
Source.209: DFBPPR15606 ---- Microorganism protein ---- Assembly factor CBP4
Source.210: DFBPPR15681 ---- Microorganism protein ---- Protein SWT21
Source.211: DFBPPR15821 ---- Microorganism protein ---- Inosose dehydratase
Source.212: DFBPPR15855 ---- Microorganism protein ---- 5-aminolevulinate synthase, mitochondrial
Source.213: DFBPPR15888 ---- Marine protein ---- Photosystem II protein D1
Source.214: DFBPPR7757 ---- Plant protein ---- Photosystem II protein D1
Source.215: DFBPPR7929 ---- Plant protein ---- Photosystem II protein D1
Source.216: DFBPPR7948 ---- Plant protein ---- Probable sucrose-phosphate synthase
Source.217: DFBPPR7995 ---- Plant protein ---- Light-independent protochlorophyllide reductase subunit B
Source.218: DFBPPR8031 ---- Plant protein ---- Photosystem II protein D1
Source.219: DFBPPR8216 ---- Plant protein ---- Photosystem II protein D1
Link-research
There are no literature reports on the discovery of this sequence in other food-source proteins.
Biological/Functional activity & target protein
ACE-inhibitory activity

The peptide exhibited low Angiotensin-Converting Enzyme (ACE) (EC 3.4.15.1) inhibitory activity with an IC50 value of 590 ± 20 μM.

Specific target protein(s) Specific Target Protein(s):
Angiotensin-converting enzyme
Taste properties & Structure
Bitterness
Literature report N.D
Bitter prediction tools Bitter taste prediction
SMILES N1[C@@]([H])(CCC1)C(=O)N[C@@]([H])([C@]([H])(CC)C)C(=O)N[C@@]([H])(CC(=CN2)C1=C2C=CC=C1)C(=O)O
Preparation method
Mode of preparation

Enzymatic hydrolysis

Enzyme(s)/starter culture

The ACE inhibitory peptide was in silico screened from the product generated by virtual gastrointestinal digestion of the proteins from C. vulgaris.

Stability & Cytotoxicity
Peptide stability
Literature report: N.D
EHP-Tool: Enzymatic Hydrolysis Prediction Tool (EHP-Tool)
Peptide cytotoxicity
Literature report: N.D
Prediction: ToxinPred
Additional information
Additional information N.D
Database cross-references
BIOPEP-UWM [D1] -
APD [D2] -
BioPepDB [D3] -
MBPDB [D4] -
Reference(s)
Primary literature Xie J, Chen X, Wu J, Zhang Y, Zhou Y, Zhang L, Tang YJ, Wei D. Antihypertensive Effects, Molecular Docking Study, and Isothermal Titration Calorimetry Assay of Angiotensin I-Converting Enzyme Inhibitory Peptides from Chlorella vulgaris. J Agric Food Chem. 2018 Feb 14;66(6):1359-1368.
PMID: 29345929
Other literature(s) N.D
PubDate 2018
Copyright © 2020. Record / license number: Chongqing ICP No. 2000214