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Summary of Significant Accounting Policies - Revenue (Details)
¥ in Thousands
 12 Months Ended
Dec. 31, 2022
CNY (¥)
item
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Summary of Significant Accounting Policies      
Number of components not performance obligations | item 2    
Stand-alone fair value as a percentage of gross selling price 1.00%    
Aggregate stand-alone fair value as a percentage of contract price 3.00%    
Number of packages offered | item 2    
Number of performance obligations per package | item 1    
Package term 1 month    
Forfeiture rate (as a percent) 0.00%    
Revenue allocated to performance obligation ¥ 492,925 ¥ 371,849 ¥ 162,485
Amount charged to selling and marketing expenses 215,201 155,884 ¥ 78,229
Liabilities related to unredeemed points 680,660 468,878  
Vehicle sales      
Summary of Significant Accounting Policies      
Contract liabilities 3,740,108 2,294,528  
Sales of packages and provision of power solution      
Summary of Significant Accounting Policies      
Contract liabilities 309,198 ¥ 180,732  
BaaS battery buy-out service      
Summary of Significant Accounting Policies      
Revenue recognized ¥ 36,320