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However, in order to improve the combat effectiveness of Yi Xingchen and others, Ji Feng passed on the first set of aerobics to them. However, for the sake of confidentiality, he only taught it to Yi Xingchen, Guo Tao, Yao Zhijian and Liu Zejun for the time being. As for the others, Security guards also need to be inspected by Yi Xingchen....