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Prepayments And Other Current Assets - Summary of Prepayments and Other Current Assets (Detail) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥)
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Prepaid Expense and Other Assets [Abstract] |  |  |
Prepayments for vehicles | ¥ 712,544,814 | $ 111,813,830 | ¥ 403,116,119
Vehicles and telematics devices | 131,722,840 | 20,670,188 | 54,725,824
Deposits held by third-parties | 48,176,225 | 7,559,901 | 18,171,682
Other receivables from third parties | 33,092,696 | 5,192,966 | 10,461,282
Accrued input value-added tax | 22,922,301 | 3,597,009 | 26,623,275
Prepaid expenses | 9,977,021 | 1,565,612 | 14,331,513
Interest receivables | 5,655,031 | 887,398 | 4,889,508
Loan to suppliers | 0 | 0 | 1,573,800
Others | 18,857,709 | 2,959,187 | 24,467,956
Total | ¥ 982,948,637 | $ 154,246,091 | ¥ 558,360,959

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