Objective To establish the Master Cell Bank(MCB) and Working Cell Bank(WCB) of human diploid cell(2BS strain). Methods Human diploid cells(2BS strain)were cultured in a large scale and stored lyophilized to establish the master and working cell banks. The cells in established cell banks were counted by trypan blue staining, calculated for cell activity,and tested for chromosome,adventitious viral agents,identity,microorgan contamination and tumorigenicity. The cells from working cell bank qualified in overa...