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Mezzanine equity (Tables) | 12 Months Ended
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Dec. 31, 2023
Temporary Equity Disclosure [Abstract] |
Schedule of activities of the Redeemable Convertible Preferred Shares | All Preferred Shares were converted into ordinary shares as noted in the Recapitalization Note 1(b) and have been adjusted below to reflect the effect of Recapitalization:
| Series Angel Preferred Shares |  | Series A Preferred Shares |  | Series A+ Preferred Shares |  | Series A++ Preferred Shares |  | Series B Preferred Shares |  |
| Shares |  | Carrying amount |  | Shares |  | Carrying amount |  | Subscription receivable |  | Shares |  | Carrying amount |  | Shares |  | Carrying amount |  | Shares |  | Carrying amount |  | Subscription receivable |  | Total
|  |  | RMB |  |  |  | RMB |  | RMB |  |  |  | RMB |  |  |  | RMB |  |  |  | RMB |  | RMB |  | RMB
Balance as of January 01, 2021 | — |  | — |  | 26,841,535 |  | 1,264,579 |  | (1,032,104) |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 232,475
Issuance of preferred shares | 6,016,207 |  | 273,519 |  | — |  | — |  | — |  | 29,361,157 |  | 1,331,641 |  | 8,546,916 |  | 452,241 |  | 17,615,165 |  | 1,104,188 |  | (159,215) |  | 3,002,374
Issuance cost | — |  | — |  | — |  | — |  | — |  | — |  | (10,000) |  | — |  | — |  | — |  | — |  | — |  | (10,000)
Re-designation of ordinary shares into Series A Preferred Shares | — |  | — |  | 2,343,309 |  | 97,660 |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 97,660
Subscription contributions from shareholders | — |  | — |  | — |  | — |  | 1,032,104 |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 1,032,104
Accretion of Redeemable Convertible Preferred Shares | — |  | 13,655 |  | — |  | 99,161 |  | — |  | — |  | 79,336 |  | — |  | 23,005 |  | — |  | 28,407 |  | — |  | 243,564
Foreign currency translation adjustment | — |  | (3,589) |  | — |  | (32,087) |  | — |  | — |  | (14,306) |  | — |  | 167 |  | — |  | (15,278) |  | (177) |  | (65,270)
Balance as of December 31, 2021 | 6,016,207 |  | 283,585 |  | 29,184,844 |  | 1,429,313 |  | — |  | 29,361,157 |  | 1,386,671 |  | 8,546,916 |  | 475,413 |  | 17,615,165 |  | 1,117,317 |  | (159,392) |  | 4,532,907
Subscription contributions from shareholders | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 159,485 |  | 159,485
Accretion of Redeemable Convertible Preferred Shares | — |  | 21,916 |  | — |  | 100,884 |  | — |  | — |  | 106,959 |  | — |  | 36,732 |  | — |  | 88,387 |  | — |  | 354,878
Foreign currency translation adjustment | — |  | 26,949 |  | — |  | 135,409 |  | — |  | — |  | 131,767 |  | — |  | 45,179 |  | — |  | 106,268 |  | (93) |  | 445,479
Conversion of Preferred Shares to Ordinary Shares upon the completion of the IPO | (6,016,207) |  | (332,450) |  | (29,184,844) |  | (1,665,606) |  | — |  | (29,361,157) |  | (1,625,397) |  | (8,546,916) |  | (557,324) |  | (17,615,165) |  | (1,311,972) |  | — |  | (5,492,749)
Balance as of December 31, 2022 and 2023 | — |  | — |  |  | — |  | — |  |  | — |  |  | — |  | — |  |  | — |  | — |  |  | — |  | — |  |  | — |  |  | — |

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- Definition Tabular disclosure of temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480244/480-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (27) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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