Leadership contingency is not a kind of contingency, but its essence is to proceed from reality. According to the specific circumstances of leadership activities, it is necessary to flexibly adapt or lead the way to achieve leadership value. In leadership activities, contingency is methods and strategies with constant value And direction. According to the above definition, which of the following is leadership changes? ['Chief Zhao gave the complicated task to Xiao Zhang, who is more capable, and the new Xiao Chen was responsible for collecting information.', 'Secretary Wang just led the cadres and the masses to complete the drought relief and self-rescue work, and was busy coordinating the road network construction disputes.', 'Li County Chief personally went to the countryside to send water, and the accompanying persons took photos. After the video, Li County Chief returned to the county town by special car.', 'Chief Zhang is always decisive and resolute in his work, but he will obey his wife after returning home from work.']