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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2021
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Schedule of Intangible assets | Intangible assets consist of the following:
|  | As of December 31, |
|  | 2020 |  |  | 2021 |
|  | RMB |  |  | RMB |  |  | US$ |
Finite-lived intangible asset: |  |  |  |  |  |  |  |  |  |  |  |
Software |  |  | 4,164,764 |  |  |  | 5,796,893 |  |  |  | 909,659 |
Less: Accumulated amortization |  |  | (2,368,396 | ) |  |  | (2,956,852 | ) |  |  | (463,995 | )
Total finite-lived intangible asset |  |  | 1,796,368 |  |  |  | 2,840,041 |  |  |  | 445,664 |
Indefinite-lived intangible asset: |  |  |  |  |  |  |  |  |  |  |  |
License* |  |  | 43,091,503 |  |  |  | 43,091,503 |  |  |  | 6,761,998 |
Total infinite-lived intangible asset |  |  | 43,091,503 |  |  |  | 43,091,503 |  |  |  | 6,761,998 |
|  |  | 44,887,871 |  |  |  | 45,931,544 |  |  |  | 7,207,662 |
Schedule of finite-lived intangible assets, future amortization expense | The estimated useful life of the intangible assets are 6-10 years. The estimated aggregate amortization expenses for each of the five succeeding fiscal years are as follows:
|  | As of December 31, |
|  | 2022 |  |  | 2023 |  |  | 2024 |  |  | 2025 |  |  | 2026 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |
Software |  |  | 638,471 |  |  |  | 335,489 |  |  |  | 329,697 |  |  |  | 328,671 |  |  |  | 270,141 |
|  | US$ |  |  | US$ |  |  | US$ |  |  | US$ |  |  | US$ |
Software |  |  | 100,190 |  |  |  | 52,646 |  |  |  | 51,737 |  |  |  | 51,576 |  |  |  | 42,391 |

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- Definition Tabular disclosure of impaired intangible assets excluding goodwill. This may include a description of the facts and circumstances leading to the recording of impairment charges of intangible assets in the period, the amount of the impairment charges, the methods of determining fair value of the associated assets, the caption in the income statement in which the impairment losses are aggregated, and the segment in which the impaired intangible assets are reported. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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