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Finance Lease Receivables, Net - Summary of Future Minimum Lease Payments Receivable (Detail) - Dec. 31, 2021
CNY (¥)
USD ($)
Capital Leases, Future Minimum Payments Receivable, Fiscal Year Maturity [Abstract]    
2022 ¥ 1,519,798,191 $ 238,489,500
2023 896,477,696 140,676,913
2024 249,411,737 39,138,144
2025 33,033,582 5,183,690
2026 17,790,380 2,791,699
Total ¥ 2,716,511,586 $ 426,279,946