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Segment Information (Tables)
12 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Schedule of key revenues streams of auto shows segment
    December 31, 2016
RMB
    December 31, 2017
RMB
    December 31, 2018
RMB
 
Auto shows     50,840       263,927       644,251  
Group-purchase facilitation     66,513       16,739       -  
Virtual dealership, demand-side platform advertising services and others     -       -       6,762  
Total     117,353       280,666       651,013