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Commitments and Contingencies (Details)
$ in Thousands, ¥ in Millions
 1 Months Ended 6 Months Ended 12 Months Ended
Dec. 15, 2025
USD ($)
Dec. 15, 2025
CNY (¥)
Apr. 28, 2025
CNY (¥)
Jan. 09, 2025
USD ($)
Jan. 31, 2023
CNY (¥)
Jul. 31, 2021
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CNY (¥)
Jun. 30, 2023
CNY (¥)
Apr. 30, 2023
Jan. 31, 2023
CNY (¥)
Jun. 30, 2025
USD ($)
Jun. 30, 2025
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2024
CNY (¥)
Nov. 30, 2023
CNY (¥)
Dec. 31, 2021
CNY (¥)
Commitments and Contingencies [Line Items]                                        
Loans amount             $ 150,000 ¥ 1,088.0                        
Payment obligation                                       ¥ 1,088.0
Converted debt                                       ¥ 1,088.0
Equity shares percentage                                       10.625%
Final offer                     ¥ 296.8                  
Percentage of contract value                   60.00%                    
Interest amount         ¥ 94.7           ¥ 94.7     $ 2,691   $ 3,248 $ 37      
Equity interest amount                       $ 700 ¥ 5.0              
Lawsuit provision (in Dollars) | $                       $ 1,595 [1]   $ 7,360 [1],[2]   [2]        
System development service contract                 ¥ 2.6                      
Percentage of installment                           30.00%       30.00%    
Subsequent payments                             ¥ 2.1          
Payment                           $ 200 ¥ 1.7          
Owned amount                                     ¥ 0.9  
Repayment loan (in Dollars) | $           $ 10,000                            
Accrued interest rate           12.00%                            
Average closing price rate                       50.00% 50.00%              
Number of trading days                       20 days 20 days              
Compensation amount     ¥ 238.7                                  
liquidated damages value     7.3                                  
Obligation payments     ¥ 246.3                     6,500       ¥ 47.4    
Penalty and accrued interests                                   ¥ 0.6    
Forecast [Member]                                        
Commitments and Contingencies [Line Items]                                        
Payment | $       $ 87                                
Settlement amount $ 100 ¥ 0.9                                    
Guozhong Tianhong [Member]                                        
Commitments and Contingencies [Line Items]                                        
Debts payable (in Dollars) | $                           149,100   74,700 151,900      
Tianjin Tuoda [Member]                                        
Commitments and Contingencies [Line Items]                                        
Debts payable (in Dollars) | $                           73,300   71,700 68,700      
Guozhong Tianhong [Member]                                        
Commitments and Contingencies [Line Items]                                        
Debts payable (in Dollars) | $                           $ 149,100   $ 153,200 $ 157,700      
Tiancheng Coating System Changzhou Co., Ltd.[Member]                                        
Commitments and Contingencies [Line Items]                                        
Equity interest amount                         ¥ 250.0              
Lawsuit provision (in Dollars) | $                       $ 700                
Xingjing (Guangzhou) Technology Co., Ltd. [Member]                                        
Commitments and Contingencies [Line Items]                                        
Lawsuit provision (in Dollars) | $                       200                
Shanghai Longchuang Automotive Design Co., Ltd [Member]                                        
Commitments and Contingencies [Line Items]                                        
Lawsuit provision (in Dollars) | $                       $ 100                
[1] Lawsuit provision represented liabilities accrual for closed and on-going lawsuits the Group did not pay or make settlement. The Group regularly reviews these contingencies to determine whether its accruals are adequate. The amount of ultimate loss may differ from these estimates. As of June 30, 2025 and the issuance date of the unaudited condensed consolidated financial statements, there are three different on-going lawsuits in the total estimated amount of RMB6.3 million (US$0.9 million). The remaining amount of the balance is about other thirteen closed lawsuits of RMB5.1 million (US$0.7 million), which consists of unpaid claim amount, penalty and accrued interests.
[2] Lawsuit provision represented liabilities accrual for closed and on-going lawsuits the Group did not pay or make settlement. The Group regularly reviews these contingencies to determine whether its accruals are adequate. The amount of ultimate loss may differ from these estimates. As of December 31, 2024 and the issuance date of the consolidated financial statements, there are six different on-going lawsuits in the total estimated amount of RMB49.8 million (US$6.8 million). The remaining amount of the balance is about other six closed lawsuits of RMB3.9 million (US$0.6 million), which consists of unpaid claim amount, penalty and accrued interests.