Why do Japanese delegates come to China, China welcomes them with a sign, and China delegates go to Japan without a sign?

Sao year, this is the strange thing about Japan, and it also highlights low-key environmental protection and no slogan. Many government departments, post offices and banks in Japan. They all go to work at eight or nine in the morning and get off work at six or five in the evening. If you are unlucky and the commuting time coincides with this, you can cry.