The visa for going abroad has expired. Can I not come back?

You don't have to come back, but you have to bear the impact on yourself.

For example:

1. You need to pay a fine when you return to China.

2. Leaving a bad record will affect future entry or entry into other countries.

3. Being reported and found will be repatriated.

Suggestion: Go back to China before the visa expires, or apply for an extension at the local immigration office before the visa expires. There is no need to return to China normally after the extension, and there will be no adverse effects.