2-3 months. Generally speaking, the recruitment of Zhengzhou Railway Bureau needs on-the-job training, and the training time generally ranges from 2 to 3 months. But for some middle and senior management positions, the training time will be longer. China Railway Zhengzhou Bureau Group Co., Ltd. is one of the 18 Railway Bureau Group companies managed by China Railway Corporation, which is referred to as "Zheng Bureau" for short. It was formally established on1March 1949 1 1, and its headquarters is located in Zhengzhou City, Henan Province. Located in the center of the national railway network and the strategic center of chinese national geography traffic. It spans the three provinces of Henan, Shaanxi and Shandong, and the four trunk lines of Beijing-Guangzhou, Longhai, Liu Jiao and Beijing-Kowloon meet here. It is the traffic lifeline based on the Central Plains, serving all directions and connecting things.