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Organization and principal activities (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2021
HKD ($)
Dec. 31, 2021
CNY (¥)
True Silver Limited [Member]      
Statement [Line Items]      
Place Of Incorporation British Virgin Islands    
Issued And Fully Paid Up Capital $ 50,000    
Group's Effective Interest 100.00% 100.00% 100.00%
Principal Activities Investment holding    
Held By Company 100.00% 100.00% 100.00%
Chutian Financial Holdings (Hong Kong) Limited [Member]      
Statement [Line Items]      
Place Of Incorporation Hong Kong    
Issued And Fully Paid Up Capital   $ 10,000  
Group's Effective Interest 100.00% 100.00% 100.00%
Principal Activities Investment holding    
Held By A Subsidiary 100.00% 100.00% 100.00%
Wuhan Chutian Investment Holdings Co. Ltd [Member]      
Statement [Line Items]      
Place Of Incorporation PRC    
Issued And Fully Paid Up Capital $ 3,000,000    
Group's Effective Interest 100.00% 100.00% 100.00%
Principal Activities Investment holding    
Held By A Subsidiary 100.00% 100.00% 100.00%
Variable interest entity Hubei Chutian Microfinance Co., Ltd [Member]      
Statement [Line Items]      
Place Of Incorporation PRC    
Issued And Fully Paid Up Capital | ¥     ¥ 450,000,000
Group's Effective Interest 80.00% 80.00% 80.00%
Principal Activities Microfinance lender    
Held By A Subsidiary 80.00% 80.00% 80.00%