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Condensed Financial Information of the Parent Company - Condensed Statements of Cash Flows (Detail)
 12 Months Ended
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