What do you think of Japan's railway traffic after traveling to Japan?

The interval classification of ordinary, quasi-urgent and fast vehicles is not very friendly to short-distance traffic, but it is good for long-distance traffic. The last one was late. It's good. Most platforms don't have security doors, and I'm still a little nervous during peak hours. The female carriage is weak and cold, and all kinds of special seats reflect the service performance after the quality pursuit reaches a certain level.