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Condensed Financial Information of the Parent Company - Condensed Statements of Comprehensive Income (Detail)
 12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Condensed Statement of Income Captions [Line Items]        
General and administrative ¥ (276,179,441) $ (43,338,581) ¥ (265,691,411) ¥ (236,551,077)
Foreign exchange (loss) 1,351,400 212,064 (8,848,354) 5,141,112
Net gain (loss) on equity securities (12,991,522) (2,038,654) 3,353,381,213 86,011,918
Income from equity method investments 0 0 0 (926,205)
Other income, net 41,911,589 6,576,843 49,139,337 41,300,464
Other expense 6,605,833 1,036,599 838,115 5,121,054
Net income (loss) before income taxes 12,308,294 1,931,441 3,743,273,711 487,819,233
Income tax expense (20,852,646) (3,272,235) (369,853,650) (82,960,493)
Net income (loss) (8,544,352) (1,340,794) 3,373,420,061 404,858,740
Other comprehensive income (loss), net of tax (72,130,683)   (234,817,165) 9,977,742
Total comprehensive income (loss), net of tax (80,675,035) (12,659,672) 3,138,602,896 414,836,482
Parent Company [Member]        
Condensed Statement of Income Captions [Line Items]        
General and administrative (10,079,685) (1,581,723) (11,854,536) (10,164,242)
Interest Income 4,440,117 696,751 1,889,711 4,831,112
Foreign exchange (loss) (390,858) (61,334) (706,543) (26,334)
Net gain (loss) on equity securities (27,278,116) (4,280,532) 3,315,475,734  
Income from equity method investments 29,054,673 4,559,312 59,992,497 396,273,356
Other income, net 1,928,027 302,550 4,725,168  
Other expense (6,218,510) (975,818) (4,184)  
Net income (loss) before income taxes (8,544,352) (1,340,794) 3,369,517,847 390,913,892
Income tax expense 0 0    
Net income (loss) (8,544,352) (1,340,794) 3,369,517,847 390,913,892
Other comprehensive income (loss), net of tax (72,130,683) (11,318,878) (234,817,165) 9,977,742
Total comprehensive income (loss), net of tax ¥ (80,675,035) $ (12,659,672) ¥ 3,134,700,682 ¥ 400,891,634