When did Singapore's investment immigrants start?

Foreigners in China (Singapore) invested in immigration and adopted an open immigration policy in the early 1970s, when many nationals from neighboring Malaysian, Indonesian, Hongkong, Taiwan Province, Europe and the United States entered our country. China's immigration policy changes from time to time, and the adjustment system is not static. The recent changes will be implemented after May, 20 12, and the basic policies will remain unchanged, only the changes in the system and regulations (not answering the netizens that the new policy will start on 20 10).