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Goodwill - Summary of Goodwill (Detail)
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2019
USD ($)
Balance at December 31, 2019 ¥ 148,657,971   $ 23,327,680 ¥ 145,063,857 $ 22,232,009 ¥ 145,063,857 $ 20,837,119
Balance at December 31, 2020 148,657,971   23,327,680 145,063,857 22,232,009 145,063,857 20,837,119
Goodwill acquired $ 563,995          
Balance at December 31, 2021 ¥ 148,657,971   $ 23,327,680 ¥ 145,063,857 $ 22,232,009 ¥ 145,063,857 $ 20,837,119