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Prepayments and other assets - Allowance for doubtful accounts (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2019
Prepayment and other assets
Balance at the beginning of the year	¥ 31,694	¥ 4,997
Provision (Reversal) for the year/period	(20,179)	26,697	¥ 614
Write-off	(3,871)		128
Balance at the end of the year/period	¥ 7,644	¥ 31,694	¥ 4,255

X

- Definition

Amount of write-off of financing receivables, charged against allowance for credit losses.

+ References

No definition available.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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