​

​

As of December 31, 

​

​

2023

​

2024

​

RMB

RMB

Advances to suppliers

70,364

47,204

Other receivables

31,502

37,236

Prepayment for equipment

9,444

2,367

Lease hold improvement

527

1,383

Prepaid expenses

​

—

​

1,138

Expected return assets

17

88

Total

111,854

89,416

Less: non-current portion

(10,535)

(18,053)

Prepaid expenses and other assets-current portion

101,319

71,363