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Ordinary shares (Details) $ / shares in Units, ¥ in Thousands, $ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 15, 2023 $ / shares shares | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 $ / shares shares | Dec. 31, 2021 | Apr. 26, 2021 $ / shares shares
Ordinary shares |  |  |  |  |  |
Ordinary shares, shares authorized |  | 496,253,373,300 |  | 496,253,373,300 |  | 95,000
Ordinary shares, par value (in dollars per share) | $ / shares |  | $ 0.0000001 |  | $ 0.0000001 |  | $ 0.0000001
Ordinary shares, shares issued |  | 5,621,490,964 |  | 1,218,621,800 |  |
Ordinary shares, shares outstanding |  | 5,621,490,964 |  | 1,218,621,800 |  |
Class A Ordinary Shares |  |  |  |  |  |
Ordinary shares |  |  |  |  |  |
Number of underlying shares represented by one ADS |  | 35 |  | 35 | 35 |
IPO | ADS |  |  |  |  |  |
Ordinary shares |  |  |  |  |  |
Shares issued | 4,000,000 |  |  |  |  |
Net proceeds |  | $ 57,660 | ¥ 409,282 |  |  |
IPO | Class A Ordinary Shares |  |  |  |  |  |
Ordinary shares |  |  |  |  |  |
Ordinary shares, par value (in dollars per share) | $ / shares | $ 0.0000001 |  |  |  |  |
Shares issued | 140,000,000 |  |  |  |  |
Number of underlying shares represented by one ADS | 35 |  |  |  |  |
Previously reported |  |  |  |  |  |
Ordinary shares |  |  |  |  |  |
Ordinary shares, shares authorized |  | 496,195,831,500 |  | 496,195,831,500 |  |
Ordinary shares, par value (in dollars per share) | $ / shares |  | $ 0.0000001 |  | $ 0.0000001 |  |
Ordinary shares, shares issued |  | 5,621,490,964 |  | 1,161,080,000 |  |
Ordinary shares, shares outstanding |  | 5,621,490,964 |  | 1,161,080,000 |  |

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