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Warrant liabilities - ECARX Warrants in connection with the Merger (Details)
1 Months Ended
Dec. 31, 2022
shares
Dec. 31, 2024
$ / shares
decimal
¥ / shares
Dec. 31, 2023
decimal
Dec. 31, 2023
$ / shares
Dec. 31, 2023
Dec. 31, 2023
¥ / shares
ECARX Warrants            
Warrant liabilities            
Number of warrants issued (in shares) 23,871,971          
ECARX Public Warrants            
Warrant liabilities            
Number of warrants issued (in shares) 14,999,971          
Number of days after the completion of the Merger for commencement of exercise of warrants 30 days          
Exercise price of warrants, (in USD per share) | $ / shares   $ 11.50        
Warrant term   5 years        
ECARX Private Warrants            
Warrant liabilities            
Number of warrants issued (in shares) 8,872,000          
Risk-free rate of return (%) | Level 3 | ECARX Private Warrants            
Warrant liabilities            
Warrants measurement input   0.0427     0.0393  
Volatility | Level 3 | ECARX Private Warrants            
Warrant liabilities            
Warrants measurement input   0.5020     0.2950  
Expected dividend yield | Level 3 | ECARX Private Warrants            
Warrant liabilities            
Warrants measurement input   0.000     0.000  
Expected term | Level 3            
Warrant liabilities            
Warrants measurement input | decimal   3 4      
Expected term | Level 3 | ECARX Private Warrants            
Warrant liabilities            
Warrants measurement input | decimal   4.0 5.0      
Fair value of the underlying ordinary shares (in USD or RMB per share) | Level 3 | ECARX Private Warrants            
Warrant liabilities            
Warrants measurement input   15.40   3.16   22.44