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LONG-TERM INVESTMENTS AND EQUITY METHOD INVESTMENT - Equity securities without readily determinable fair value - (Details)
1 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
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Nov. 30, 2021
USD ($)
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Aug. 31, 2021
USD ($)
Aug. 31, 2021
CNY (¥)
Apr. 30, 2021
USD ($)
Apr. 30, 2021
CNY (¥)
Oct. 31, 2017
USD ($)
Oct. 31, 2017
CNY (¥)
Dec. 31, 2024
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Dec. 31, 2023
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Dec. 31, 2022
USD ($)
shares
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Equity securities without readily determinable fair value                   $ 3,248,427 $ 3,519,993  
Payment for longterm investments                     500,000 $ 243,289
Fortune Rise Acquisition Corporation ("FRLAU")                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Equity securities without readily determinable fair value                   200,237 200,237  
Percentage of equity interest acquired     0.80%                  
Payment for longterm investments     $ 201,248                  
Change of fair value                   0 0  
Fortune Rise Acquisition Corporation ("FRLAU") | Founder Shares                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Number of shares acquired | shares     122,000                  
Number of shares held, after sale | shares                       98,800
Fortune Rise Acquisition Corporation ("FRLAU") | Private Shares                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Number of shares acquired | shares     20,000                  
Fortune Rise Acquisition Corporation ("FRLAU") | Representative Shares                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Number of shares acquired | shares     60,000                  
Shenzhen Guru Club Information Technology Group Co., LTD. ("Guru")                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Equity securities without readily determinable fair value                   1,369,994 1,408,472  
Percentage of equity interest acquired               1.00% 1.00%      
Payment for longterm investments               $ 1,536,972 ¥ 10,000,000      
Change of fair value                   0 0  
Shanghai Realize Investment Consulting Co., Ltd. ("Realize")                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Equity securities without readily determinable fair value                   821,997 845,082  
Percentage of equity interest acquired       1.50% 1.50%              
Payment for longterm investments       $ 926,183 ¥ 6,000,000              
Change of fair value                   0 0  
Shanghai Yisong Consulting Management Co., LTD ("Yisong")                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Equity securities without readily determinable fair value                   356,199 366,202  
Percentage of equity interest acquired           5.00% 5.00%          
Payment for longterm investments           $ 400,962 ¥ 2,600,000          
Change of fair value                   0 0  
Feutune Light Acquisition Corporation ("FLFVU")                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Equity securities without readily determinable fair value                     200,000  
Percentage of equity interest acquired   0.63%                    
Payment for longterm investments   $ 200,000                    
Feutune Light Acquisition Corporation ("FLFVU") | Private Shares                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Number of shares acquired | shares   20,000                    
Feutune Light Acquisition Corporation ("FLFVU") | Representative Shares                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Number of shares acquired | shares   60,000                    
Mainnet Group Holdings ("Mainnet")                        
Equity Securities Without Readily Determinable Fair Value [Line Items]                        
Equity securities without readily determinable fair value                   500,000 500,000  
Percentage of equity interest acquired 2.00%                      
Payment for longterm investments $ 500,000                      
Change of fair value                   $ 0 $ 0