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v3.22.1

Income Taxes - Summary of Reconciliation of Income Before the Provision of Income Taxes and Actual Provision for Income Taxes (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2021 USD ($)
Income Taxes [Line Items] |  |  |  |  |
Income before provision of income tax | ¥ 12,308,294 | $ 1,931,441 | ¥ 3,743,273,711 | ¥ 487,819,233 |
Income tax at statutory tax rate | 3,077,074 | 482,860 | 935,818,428 | 121,954,808 |
Tax rate differential | 5,070,813 | 795,721 | (852,831,321) | (36,157,163) |
Over-accrued EIT for previous years | 0 | 0 | 0 | (39,664,283) |
Impact of tax rate change | 0 | 0 | (35,511,678) | 36,367,754 |
Utilization of net operating loss carry-forward | 0 | 0 | 0 | (9,708,887) |
Non-deductible expenses | 19,443,641 | 3,051,132 | 19,219,052 | 22,277,780 |
Research and development super-deduction | (10,177,551) | (1,597,080) | (10,970,775) | (9,961,515) |
Non-taxable income | 0 | 0 | (982,266) | (3,587,542) |
Change in valuation allowance | 9,894,006 | 1,552,585 | (2,412,144) | 1,439,541 |
Income tax expenses | 20,852,646 | 3,272,235 | 369,853,650 | 82,960,493 |
China [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Income before provision of income tax | ¥ 64,790,713 | $ 10,167,077 | ¥ 448,162,790 | ¥ 474,699,082 |
PRC statutory income tax rate | 25.00% | 25.00% | 25.00% | 25.00% |
Withholding tax | ¥ (6,455,337) |  | ¥ 317,524,354 | ¥ 0 | $ (1,012,983)

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