Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Employee Benefit Plans (Details)

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Summary of Significant Accounting Policies - Employee Benefit Plans (Details) - CNY (¥)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Employee benefit plans      
Expense due to employee benefit plans ¥ 14,870,527 ¥ 8,443,633 ¥ 10,210,835
Cost of revenues      
Employee benefit plans      
Expense due to employee benefit plans 5,989,994 3,022,423 2,363,553
Research and development      
Employee benefit plans      
Expense due to employee benefit plans 1,294,439 962,709 2,468,898
Sales and marketing      
Employee benefit plans      
Expense due to employee benefit plans 3,775,110 1,881,648 2,077,128
General and administrative      
Employee benefit plans      
Expense due to employee benefit plans ¥ 3,810,984 ¥ 2,576,853 ¥ 3,301,256