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Schedule of Stock Options Activities (Details)
¥ in Thousands, shares in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2024
$ / shares
Jun. 30, 2024
CNY (¥)
shares
Jun. 30, 2023
$ / shares
Jun. 30, 2023
CNY (¥)
shares
Dec. 31, 2023
$ / shares
Dec. 31, 2023
CNY (¥)
shares
Dec. 31, 2022
CNY (¥)
shares
Number of Options Outstanding, Total, Outstanding, Beginning balance [1]   573   7,949   7,949  
Weighted Average exercise price, Outstanding, Beginning balance | $ / shares $ 0.6675   $ 1.7905   $ 1.7905    
Weighted average remaining contractual life, Outstanding, Ending balance   9 years 7 months 20 days   4 years 2 months 1 day   9 years 8 months 23 days 4 years 8 months 1 day
Aggregated intrinsic value, Outstanding, Beginning balance | ¥   ¥ 23,775   ¥ 65,572   ¥ 65,572  
Number of Options Outstanding, Total, Replacement [1]   (22)   (6,381)      
Weighted Average exercise price, Replacement | $ / shares 7.4245   0.9353        
[custom:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualLifeReplacement]          
Aggregated intrinsic value, Replacement | ¥          
Number of Options Outstanding, Total, Granted [1]   599        
Weighted Average exercise price, Granted | $ / shares 0.1000          
Weighted average remaining contractual life, Granted          
Aggregated intrinsic value, Granted | ¥          
Number of Options Outstanding, Total, Forfeited [1]   (9)   (9)      
Weighted Average exercise price, Forfeited | $ / shares 5.3707   8.1442        
[custom:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualLifeForfeited]          
Aggregated intrinsic value, Forfeited | ¥          
Number of Options Outstanding, Total, Outstanding, Ending balance [1]   1,141   1,559   573 7,949
Weighted Average exercise price, Outstanding, Ending balance | $ / shares 0.1963   5.2484   $ 0.6675    
Aggregated intrinsic value, Outstanding, Ending balance | ¥   ¥ 5,979   ¥ 86   ¥ 23,775 ¥ 65,572
Number of Options Outstanding,Total, Exercisable, Ending balance [1]   519   1,559      
Weighted Average exercise price, Exercisable, Ending balance | $ / shares $ 0.3076   $ 5.2484        
Weighted average remaining contractual life, Exercisable, Ending balance   9 years 7 months 6 days   4 years 2 months 1 day      
Aggregated intrinsic value, Exercisable, Ending balance | ¥   ¥ 2,734   ¥ 86      
Employees [Member]              
Number of Options Outstanding, Total, Outstanding, Beginning balance [1]   573   7,618   7,618  
Number of Options Outstanding, Total, Replacement [1]   (22)   (6,381)      
Number of Options Outstanding, Total, Granted [1]   599        
Number of Options Outstanding, Total, Forfeited [1]   (9)   (9)      
Number of Options Outstanding, Total, Outstanding, Ending balance [1]   1,141   1,228   573 7,618
Number of Options Outstanding,Total, Exercisable, Ending balance [1]   519   1,228      
Consultant [Member]              
Number of Options Outstanding, Total, Outstanding, Beginning balance [1]     331   331  
Number of Options Outstanding, Total, Replacement [1]          
Number of Options Outstanding, Total, Granted [1]          
Number of Options Outstanding, Total, Forfeited [1]          
Number of Options Outstanding, Total, Outstanding, Ending balance [1]     331   331
Number of Options Outstanding,Total, Exercisable, Ending balance [1]     331      
[1] Shares outstanding for all periods reflect the adjustment for Reverse Recapitalization (Note 3).