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Intangible Assets - Schedule of finite-lived intangible assets, future amortization expense (Detail) - Dec. 31, 2021
CNY (¥)
USD ($)
Finite-Lived Intangible Assets, Gross [Abstract]    
2022 ¥ 638,471 $ 100,190
2023 335,489 52,646
2024 329,697 51,737
2025 328,671 51,576
2026 ¥ 270,141 $ 42,391