Starting from the decentralization during the reform and opening-up period in 1978, the growth of China's railroad has gone through the process of decentralization and then re-centralization, which is also one of the most special stages. The development process of CR Express is a epitome of the history of China's railroad development. Since its opening in 2011, its transportation volume has been showing a trend of steady growth. Since the epidemic, the China-Europe liner has ushered in a period of extremely rapid development. The fundamental reason for this is that the unexpected demand under the ad hoc situation has shaped the decentralized policy into a more state-led approach to developing the freight train operation. This paper will focus on this phenomenon, analyze the reasons for this trend from various aspects such as politics, economy, international situation, etc., and elaborate the challenges faced by the CR Express in the post epidemic era as well as the implications of this development process for China's infrastructure construction.