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Accounts Receivable and Contract Assets - Schedule of Movement of Provision for Accounts Receivable (Detail) - CNY (¥) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Receivables [Abstract] |  |
Beginning balance | ¥ 50,544 |
Impact due to adoption of new revenue standard |  | ¥ 16,501
Current period accrual | 274,375 | 107,352
Current period reversal | (12,493) | (700)
Current period write-off | (166,727) | (72,609)
Ending balance | ¥ 145,699 | ¥ 50,544

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- Definition Allowance for doubtful accounts receivable current period reversal. + References No definition available. + Details
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