v3.25.2
Summary of Significant Accounting Policies - Schedule of Assets Measured at Fair Value on Recurring Basis (Details) - CNY (¥)
Jun. 30, 2025
Dec. 31, 2024
Cryptocurrencies [Member]    
Schedule of Assets Measured at Fair Value on Recurring Basis [Line Items]    
Assets, fair value ¥ 242,889,085 ¥ 776,702,624
Cryptocurrencies [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Schedule of Assets Measured at Fair Value on Recurring Basis [Line Items]    
Assets, fair value 242,889,085 776,702,624
Cryptocurrencies [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Schedule of Assets Measured at Fair Value on Recurring Basis [Line Items]    
Assets, fair value
Cryptocurrencies [Member] | Unobservable Inputs (Level 3) [Member]    
Schedule of Assets Measured at Fair Value on Recurring Basis [Line Items]    
Assets, fair value
Convertible notes denominated in bitcoin [Member]    
Schedule of Assets Measured at Fair Value on Recurring Basis [Line Items]    
Assets, fair value 470,948,166  
Convertible notes denominated in bitcoin [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Schedule of Assets Measured at Fair Value on Recurring Basis [Line Items]    
Assets, fair value  
Convertible notes denominated in bitcoin [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Schedule of Assets Measured at Fair Value on Recurring Basis [Line Items]    
Assets, fair value 470,948,166  
Convertible notes denominated in bitcoin [Member] | Unobservable Inputs (Level 3) [Member]    
Schedule of Assets Measured at Fair Value on Recurring Basis [Line Items]    
Assets, fair value