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Loss per share - Schedule of basic and diluted net loss per share (Details) ¥ / shares in Units, ¥ in Thousands	6 Months Ended
	Jun. 30, 2024 $ / shares	Jun. 30, 2024 CNY (¥) ¥ / shares shares	Jun. 30, 2023 CNY (¥) ¥ / shares shares
Numerator:
Numerator for basic and diluted net loss per share calculation | ¥		¥ (570,546)	¥ (375,126)
Denominator:
Weighted average number of ordinary shares – basic (in shares)		337,935,301	337,395,390
Weighted average number of ordinary shares – diluted (in shares)		337,935,301	337,395,390
Basic loss per share, ordinary shares (in CNY per share) | (per share)	$ (0.23)	¥ (1.69)	¥ (1.11)
Diluted loss per share, ordinary shares (in CNY per share) | (per share)	$ (0.23)	¥ (1.69)	¥ (1.11)

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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