From Chongqing West to Xuzhou by train via Zhengzhou, Shangqiu and other epidemic areas, will the boarding code change color?

The train starts from Chongqing West and stops in Zhengzhou and Shangqiu to Xuzhou. Will the trip code change color? According to your current epidemic prevention policy, if you encounter a trip code, it should be marked yellow, and it must be changed. If you have a fever, your health code will change from yellow to red.