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Condensed Financial Information of the Parent Company - Condensed Statements of Cash Flows (Detail) | 12 Months Ended
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Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥)
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Net income | ¥ (8,544,352) | $ (1,340,794) | ¥ 3,373,420,061 | ¥ 404,858,740
Net gain (loss) on equity securities | (5,346,389) | (838,965) | 3,289,676 | (3,289,676)
Share of profit in subsidiaries, VIE and VIE's subsidiaries | 0 | 0 | 0 | 926,205
Changes in operating assets and liabilities: |  |  |  |
Net cash provided by operating activities | (404,390,831) | (63,457,746) | (621,612,202) | 422,895,235
Net cash (used in) provided by investing activities | 2,661,222,986 | 417,603,959 | (493,563,047) | (1,198,405,622)
Net cash provided by financing activities | (1,946,434,308) | (305,438,017) | (380,822,429) | 730,547,890
Effect of exchange rate changes on cash and cash equivalents and restricted cash | (15,008,806) | (2,355,209) | (36,093,321) | 11,516,258
Net (decrease) in cash and cash equivalents and restricted cash | 295,389,041 | 46,352,987 | (1,532,090,999) | (33,446,239)
Cash and cash equivalents and restricted cash at beginning of the year | 2,314,891,724 | 363,257,026 | 3,846,982,723 | 3,880,428,962
Cash and cash equivalents and restricted cash at end of the year | 2,610,280,765 | 409,610,013 | 2,314,891,724 | 3,846,982,723
Parent Company [Member] |  |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Net income | (8,544,352) | (1,340,794) | 3,369,517,847 | 390,913,892
Net gain (loss) on equity securities | 27,278,116 | 4,280,532 | (3,315,475,734) |
Share of profit in subsidiaries, VIE and VIE's subsidiaries | (29,054,673) | (4,559,312) | (59,992,497) | (396,273,356)
Changes in operating assets and liabilities: |  |  |  |
Net cash provided by operating activities | (10,185,710) | (1,598,361) | (13,000,544) | (2,989,082)
Net cash (used in) provided by investing activities | 2,150,227,042 | 337,417,544 | 456,658,680 | (604,084,150)
Net cash provided by financing activities | (1,391,602,116) | (218,372,739) | (310,709,163) | (274,666,096)
Effect of exchange rate changes on cash and cash equivalents and restricted cash | (5,443,535) | (854,209) | (19,238,574) | 12,397,093
Net (decrease) in cash and cash equivalents and restricted cash | 742,995,681 | 116,592,235 | 113,710,399 | (869,342,235)
Cash and cash equivalents and restricted cash at beginning of the year | 114,892,815 | 18,029,190 | 1,182,416 | 870,524,651
Cash and cash equivalents and restricted cash at end of the year | ¥ 857,888,496 | $ 134,621,425 | ¥ 114,892,815 | ¥ 1,182,416

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