What is the Japanese attitude towards China immigrants? Will it be rejected?

Well, the Japanese just keep their distance politely.

If you can immigrate, Japanese should be good. As long as you are good at Japanese, there is still a lot of work, unlike what some friends say, just hard work. People who can't eat a little bitter are not suitable for going abroad. Only by comparison can we understand whether it is bitter or not.

Without bitterness, there is no sweetness.