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Accrued expenses and other liabilities
 12 Months Ended
Dec. 31, 2024
Accrued Liabilities and Other Liabilities [Abstract]  
Accrued expenses and other liabilities Accrued expenses and other liabilities
Accrued expenses and other liabilities consisted of the following:
As of December 31,
20232024
RMBRMB
Salaries and benefits payables 257,207 135,746 
Taxes payable101,487 120,748 
Product warranties41,924 50,426 
Accrued costs of the Merger54,984 54,984 
Other payables and accrued charges*158,938 264,649 
Accrued expenses and other current liabilities614,540 626,553 
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*Other payables and accrued charges primarily include accrual for research and development expenses.

Product warranty

The following table provides a reconciliation of changes in the product warranties:
Year ended December 31,
20232024
RMBRMB
Balance at the beginning of the year92,148 132,795 
Additions85,161 69,604 
Settlements(44,514)(41,898)
Balance at the end of the year132,795 160,501 
Including:
Current portion of warranty included in "Accrued expenses and other current liabilities"41,924 50,426 
Non-current portion of warranty included in "Provisions"90,871 110,075