Leadership contingency is not a kind of contingency. Its essence is that everything is based on reality. According to the specific circumstances of the leadership activity, the appropriate leadership method is adopted flexibly to realize the leadership value. The method or strategy of contingency in leadership activity is the constant value of things. And direction. According to the above definition, Which of the following are changes in leadership. ['hao Chief gave the complicated task to Xiao Zhang, who is more capable, and the new Xiao Chen was responsible for collecting information.', 'ection Chief Zhang is always quick and decisive in his work, but he will obey his wife after returning home from work.', 'ounty Chief Li personally went to the countryside to send water. After the accompanying staff took photos and videos, the County Chief Li immediately returned to the county town by a special car.', 'ecretary D Wang just led the cadres and the masses to complete the drought relief and self-rescue work, and was busy coordinating network construction disputes.']