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Income Taxes (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Apr. 01, 2018
Jan. 01, 2008
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes (Details) [Line Items]            
Income tax rate     25.00%      
Income tax, description   a new Enterprise Income Tax Law, or (“the New EIT Law”), combined the previous income tax laws for foreign invested and domestic invested enterprises in the PRC by the adoption of a unified tax rate of 25% for most enterprises with the following exceptions. According to the requirements of Cai Shui [2014] No. 26, enterprises that qualify as encouraged industrial enterprises located in Zhu Hai Heng Qin New Area (“Heng Qin New Area”) are subject to a tax rate of 15%. Shengguang Zhongshuo, as a company located in Heng Qin New Area, is qualified to enjoy the 15% preferential income tax rate.        
Annual taxable income     ¥ 1,000      
Reduced tax rate         20.00%  
Total assets of tax     ¥ 50,000      
Net operating loss expiry, description     The NOLs will start to expire from 2021 if they are not used.      
Valuation allowance     ¥ 160,252 ¥ 279,516 ¥ 356,294  
Percentage of income tax     50.00%      
Underpayment of tax liability     ¥ 100      
United States [Member]            
Income Taxes (Details) [Line Items]            
Income tax rate     21.00%      
Hong Kong [Member]            
Income Taxes (Details) [Line Items]            
Income tax rate 8.25%          
Income taxes profits earned ¥ 2,000          
Existing tax rate 16.50%          
Singapore [Member]            
Income Taxes (Details) [Line Items]            
Income tax rate     17.00% 17.00% 17.00%  
People's Republic of China [Member]            
Income Taxes (Details) [Line Items]            
Income tax rate     25.00%   50.00%  
Annual taxable income     ¥ 3,000   ¥ 1,000 ¥ 500
Net operating loss     ¥ 1,721,775 ¥ 1,508,118    
Non-resident for PRC tax purpose     If the Company were to be a non-resident for PRC tax purpose, dividends paid to it out of profits earned by PRC subsidiaries after January 1, 2008 would be subject to 10% withholding tax, if no tax treaty is applicable. In addition, under tax treaty between the PRC and Hong Kong, if the foreign investor is incorporated in Hong Kong and qualifies as the beneficial owner, the applicable withholding tax rate may be reduced to 5%, if the investor holds at least 25% in the Foreign Invested Enterprise (“FIE”); or 10%, if the investor holds less than 25% in the FIE.      
Minimum [Member]            
Income Taxes (Details) [Line Items]            
Annual taxable income     ¥ 1,000      
Preferential income tax rate     5.00%      
Maximum [Member]            
Income Taxes (Details) [Line Items]            
Annual taxable income     ¥ 3,000      
Preferential income tax rate     10.00%