On the return of Chinese immigrants from Malaysia

Unlikely, depending on their nationality? If all Malays return to the mainland, they need visas according to the entry regulations of Malays. But there is a practical way, this foreigner can get a long-term visa by buying a house in the mainland. Only in this way is the most practical.

If you don't have Malay nationality, those who only hold overseas Chinese cards in Malaysia can apply for China nationality recognition at the China Embassy in Malaysia. If you give an overseas Chinese passport or tourist card, you can go back to the mainland freely and stay in the mainland without restrictions.