v3.25.0.1
Accounts and Notes Receivables, Net - ​Schedule of Accounts and Notes Receivables (Details)
¥ in Thousands, $ in Thousands
Jun. 30, 2024
CNY (¥)
Jun. 30, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
​Schedule of Accounts and Notes Receivables [Abstract]          
Notes receivable     ¥ 242   ¥ 505
Accounts receivable ¥ 45,619   60,668   80,845
Less: allowance for doubtful accounts (30,416)   (32,019)   (31,381)
Accounts receivable, net ¥ 16,312 $ 2,245 ¥ 28,891 $ 4,069 ¥ 49,969