Can the automatic upgrade of Zhixing be turned off?

The automatic upgrade and replacement of Zhixing cannot be closed, which is mandatory by the system. Zhixing train ticket is automatically changed, and refusal is not allowed.

Changes in air tickets include changes in the same class, upgrades and airline changes. The change of train ticket refers to the visa procedures for early or late travel when the number of trains and trains changes after the purchase of train tickets.