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Convertible redeemable preferred shares - Redemption feature (Details)	12 Months Ended
	Dec. 31, 2023
Series D1 Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	8.00%
Series D2 Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	8.00%
Series E Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	8.00%
Series F Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	8.00%
Series A Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	6.00%
Series A+ Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	6.00%
Series B Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	6.00%
Series B+ Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	6.00%
Series C1 Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	8.00%
Series C2 Preferred Shares
Convertible redeemable preferred shares
Redemption amount, interest (in percent)	8.00%

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- Definition

Represents the percentage of interest calculated on original issue price from the applicable Original Issue Date as set forth in the Investor Rights Agreement up until the date of receipt by such shareholder of the full redemption amount thereof.

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