Why did the z15 train stop?

the cause of the epidemic. According to the inquiry of epidemic prevention and control, as of October 7, 222, the z15 train was from Guiyang to Beijing West. Due to the epidemic situation, Guiyang was in a high-risk area and the epidemic situation was serious, so it stopped. Guiyang, referred to as "Zhu" for short, is a prefecture-level city and the capital of Guizhou Province. It is one of the important central cities in southwest China, an important regional innovation center and an important ecological leisure and holiday tourist city in China, which was approved by the State Council.