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Accounts receivable, net (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2022 CNY (¥) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 CNY (¥)
--- | --- | --- | ---
Accounts receivable, net |  |  |
Accounts receivable - third parties | ¥ 422,743 |  | ¥ 184,546
Less: Allowance for doubtful accounts, third parties | (4,521) |  |
Accounts receivable - third parties, net | 418,222 | $ 60,636 | 184,546
Accounts receivable - related parties | 485,358 |  | 768,747
Less: Allowance for doubtful accounts | (2,366) |  |
Accounts receivable - related parties, net | ¥ 482,992 |  | ¥ 768,747

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