In 2005, Zhang He became an automobile debugging worker of Hebei Chang'an Automobile Co., Ltd. In the process of continuous practice, he created two unique techniques for diagnosing automobile problems: one is the diagnostic method of "looking, smelling, listening and feeling". Through this method, he found 42 various quality problems, reducing the company's loss by 12 million yuan; The other is the preparation of the New Chang'an Star Middle Door Adjustment Procedures and Methods, which was officially named "Zhang He Adjustment Method" by the company. This method has increased the one-time acceptance rate of cars by nearly 80%.

"It is the craftsman spirit for me to repeat simple things correctly." It is with this spirit that Zhang He has won the first place in the automobile assembly and adjustment project of the company's skill contest for three consecutive years, and has become a skilled expert enjoying special subsidies from the State Council.