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Statutory reserve (Details Narrative) - CNY (¥)
¥ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Statement [Line Items]    
Statutory reserve ¥ 18,706 ¥ 14,017
PRC [Member]    
Statement [Line Items]    
Profits after taxation, percentage 10.00%  
Statutory reserve ¥ 23,400 ¥ 17,500
Variable interest entity 50.00%