Open it in Notepad and see that 12306 involves two lines:
122.228.243.22
Dynamic. 12306.cn
6 1. 183.42.94
Dynamic. 12306.cn
Delete them, then save the file, restart the browser, and then open the 12306 website to do the previous operations. Everything is fine!
You should change the host file first. . . Me too. .