西安事件
After the negotiation of the Xi'an Incident, Zhang Yunyi was sent to the southern area to unify the people of all ranks to resist the Japanese army. In April 1937, Zhang Yunyi, Zhou Enlai and Kong Shiquan () went to Xi’an. When they arrived at Laoshan Mountain (), they encountered a surprise attack conducted by the Kuomintang. Zhang Yunyi directed the successful evacuation of other people.