Just settled in Hong Kong (non-permanent, one-way permit holder) wants to go back to work in China, is it ok?

1, One-way Permit should not go back to work in the Mainland, because you have to live in Hong Kong for seven years before you can change to permanent residence status in Hong Kong. This seven years does not mean that you will stay in Hong Kong for seven years, nor does it mean that you will stay in Hong Kong for seven years, 365 days a year. It can be understood that the focus of your life and work is in Hong Kong. This website of the Immigration Department has specific instructions. Your return to work in the mainland will affect your change after seven years.

Step 2 go back. If you hold a Hong Kong identity card, your mainland household registration has been cancelled unless you temporarily keep it. But as long as it doesn't affect your permanent residence, you'd better keep it.