Restructured by Dazhong Erqi, DaZhong Sanqi, Punan Dazhong, subsidiary of Dazhong Transport Group, the most large scale public transports backbone company -- Shanghai Dazhong Public Transport Co. Ltd, was opened its sign and formed in April 28. Shanghai Dazhong public Transport Co. Ltd. is the "super aircraft carrier" owning biggest number of running lines in Shanghai public transport area up to date, occupying nearly one third of Shanghai market shares.