Earnings (loss) per share - Diluted (Details) - CNY (¥) ¥ / shares in Units, ¥ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings (loss) per share
Profit (loss) attributable to equity holders of the Company	¥ 992,647	¥ 1,258,329	¥ (4,793,564)
Dilution effect arising from preferred shares and other financial instruments issued by subsidiaries	(8,141)	(2,404)
Profit (loss) attributable to equity holders of the Company used as the numerator in calculating diluted earnings (loss) per share	¥ 984,506	¥ 1,255,925	¥ (4,793,564)
Weighted average number of ordinary shares outstanding	1,190,875,193	1,222,224,578	1,224,576,751
Adjustments for the dilutive impact of share options, restricted shares and RSUs	28,682,542	22,883,296
Weighted average number of ordinary shares used as the denominator in calculating diluted earnings (loss) per share	1,219,557,735	1,245,107,874	1,224,576,751
Diluted earnings (loss) per share	¥ 0.81	¥ 1.01	¥ (3.91)

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The potential dilutive effect on the weighted average number of ordinary shares that relates to the assumed conversion of the entity’s instruments. It represents the aggregate of the reconciliation amounts for all classes of instruments that reflect dilutive effect on weighted average number of ordinary shares.

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The increase (decrease) to profit (loss) to reflect the dilutive effect from assumed conversion of all potential ordinary shares.

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The profit (loss) attributable to ordinary equity holders of the parent entity, adjusted for the effects of all dilutive potential ordinary shares. [Refer: Profit (loss)]

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The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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