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Long-Term Borrowings - ​Schedule of Long Term Borrowings (Details)
¥ in Thousands
6 Months Ended
Jun. 30, 2024
CNY (¥)
​Schedule of Long Term Borrowings [Line Items]  
Principal amount ¥ 12,900
Loan 1 [Member]  
​Schedule of Long Term Borrowings [Line Items]  
Maturity date Sep. 28, 2025
Principal amount ¥ 2,900
Interest rate per annum 3.45%
Name of bank Bank of China Limited Beijing Xuanwu Branch
Loan 2 [Member]  
​Schedule of Long Term Borrowings [Line Items]  
Maturity date Apr. 02, 2027
Principal amount ¥ 10,000
Interest rate per annum 3.95%
Name of bank China Construction Bank Corporation Beijing Chaoyang Branch