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Long- term investments (Detail Textuals)
Dec. 31, 2018
CNY (¥)
Long Term Investment [Line Items]  
Carrying value of cost method ¥ 1,300,000
Shanghai Three Drivers Culture Media Co Limited [Member]  
Long Term Investment [Line Items]  
Investment in cash ¥ 4,000
Percentage of equity interest 40.00%
Carrying value of equity investment ¥ 3,100