v3.26.1
Long-term investments - Combined financial information for the investee companies (Details)
 12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2025
USD ($)
ASSETS          
Cash and cash equivalents ¥ 987,630,978   ¥ 984,611,409 ¥ 1,195,351,730 $ 141,229,352
Financial investments 1,243,076,254   513,475,537   177,757,540
Prepaid expenses and other current assets, net 43,546,807   34,078,494   6,227,111
Long-term investments 515,523,849   498,038,310   73,718,930
Other non-current assets 53,363,643   44,951,464   7,630,899
TOTAL ASSETS 14,665,744,467   11,819,289,603   2,097,173,566
Liabilities:          
Accrued expenses and other current liabilities 1,041,055,440   929,490,436   148,868,948
Other non-current liabilities 34,806,908   27,516,391   4,977,322
TOTAL LIABILITIES 6,828,943,830   4,866,134,961   976,525,980
Net revenues 7,639,424,431 $ 1,092,423,164 5,871,781,746 4,814,884,030  
Net Income (Loss) 1,464,552,224 209,428,183 1,539,905,765 1,186,793,974  
Consolidated investee companies          
ASSETS          
Cash and cash equivalents 499,468,134   580,989,751   71,422,993
Financial investments 3,754,016,087   4,408,605,503   536,817,161
Prepaid expenses and other current assets, net 561,278,020   656,666,733   80,261,689
Long-term investments 721,968,656   667,927,748   103,240,145
Other non-current assets 2,958,203,995   3,019,189,760   423,017,545
TOTAL ASSETS 8,494,934,892   9,333,379,495   1,214,759,533
Liabilities:          
Accrued expenses and other current liabilities 4,312,826,530   5,232,335,603   616,725,991
Long-term borrowings 1,613,492,000   1,501,000,000   230,726,287
Other non-current liabilities 2,143,675   2,143,675   306,541
TOTAL LIABILITIES 5,928,462,205   6,735,479,278   $ 847,758,819
Net revenues 205,873,146 29,439,468 326,706,200 383,611,655  
Net Income (Loss) ¥ 107,642,794 $ 15,392,715 ¥ 120,087,725 ¥ 193,845,592