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Revenues | 12 Months Ended
--- | ---
Dec. 31, 2021
Revenue Recognition and Deferred Revenue [Abstract] |
Revenues |
5. | REVENUES
The following table presents the Group’s revenues from contracts with customers disaggregated by material revenue category:
|  | For the year ended December 31 |
|  | 2019 |  |  | 2020 |  |  | 2021 |  |  | 2021 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Public cloud services recognized over time |  |  | 3,458,843 |  |  |  | 5,166,851 |  |  |  | 6,159,085 |  |  |  | 966,495 |
Enterprise cloud services: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized at a point in time |  |  | 485,991 |  |  |  | 1,368,544 |  |  |  | 2,159,869 |  |  |  | 338,931 |
Recognized over time |  |  | 317 |  |  |  | 4,145 |  |  |  | 737,948 |  |  |  | 115,800 |
|  |  | 486,308 |  |  |  | 1,372,689 |  |  |  | 2,897,817 |  |  |  | 454,731 |
Others: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized at a point in time |  |  | 11,202 |  |  |  | 36,611 |  |  |  | 1,208 |  |  |  | 190 |
Recognized over time |  |  | — |  |  |  | 1,156 |  |  |  | 2,674 |  |  |  | 419 |
|  |  | 11,202 |  |  |  | 37,767 |  |  |  | 3,882 |  |  |  | 609 |
|  |  | 3,956,353 |  |  |  | 6,577,307 |  |  |  | 9,060,784 |  |  |  | 1,421,835 |
The transaction prices allocated to the remaining performance obligations (unsatisfied or partially unsatisfied) as at December 31, 2021 are primarily related to enterprise cloud services, which are as follows:
|  | RMB |  |  | US$ |
Within one year |  |  | 27,852 |  |  |  | 4,371 |
More than one year |  |  | 23,505 |  |  |  | 3,688 |
Total |  |  | 51,357 |  |  |  | 8,059 |
Contract balances Contract liabilities relate to contracts where the Group received payments but has not yet satisfied the related performance obligations. The advance consideration received from customers for the services is a contract liability until services are provided to the customer.
|  | For the year ended December 31 |
|  | 2019 |  |  | 2020 |  |  | 2021 |  |  | 2021 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Revenue recognized from amounts included in contract liabilities at the beginning of the period |  |  | 22,782 |  |  |  | 37,550 |  |  |  | 112,221 |  |  |  | 17,610 |

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130550-203045 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130558-203045 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 + Details
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