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Accounts receivable, net
 12 Months Ended
Dec. 31, 2023
Credit Loss [Abstract]  
Accounts receivable, net Accounts receivable, net
Accounts receivable, net consisted of the following:
As of December 31,
20222023
RMBRMB
Accounts receivable, third parties422,743 288,507 
Less: Allowance for doubtful accounts, third parties (4,521)(2,688)
Accounts receivable, third parties, net418,222 285,819 
Accounts receivable, related parties837,686 1,556,969 
Less: Allowance for doubtful accounts, related parties (2,366)(11,217)
Accounts receivable, related parties, net835,320 1,545,752 
The movement of the allowance for doubtful accounts receivables is as follows:
As of December 31,
202120222023
RMBRMBRMB
Balance at the beginning of the year— — 6,887 
Additions— 6,887 9,951 
Reversal— — (2,426)
Write-off— — (507)
Balance at the end of the year— 6,887 13,905