I am sure a lot of Bangladeshi, Pakistani, Nepali, Sri Lankan intellectuals, technologists and academics educated and working in the US (in industry and academia) would be interested. Some are already going back and forth to China, I know half a dozen Bangladeshi families who live mostly in Northern China (Shanghai area) and have for a while. Chinese urban living standards in cities are at par with (or better than) US now, so this should not be an issue attracting them if CCP wants.
Every country has educated refined middle and upper middle class, and I can tell you Bangladeshi upper middle class technical intellect and talent is in no way inferior to that of the US, which they have proven in that country. And they are typically not religious zealots and are mostly Sufi (Sunni) Muslim being very open-minded and tolerant.
Middle class Bangladeshis (and above) like to confine their religious practices (if at all religious) to their own households and being private about it.
China can start by offering merit-based Visas like Canada does, but only from select countries it wishes to attract talent from.
Last time I was in Shenzhen, I saw a lot of South Asian looking people in the subways. I think a lot of them are in tech related industries. So I have no doubt that if China provided an avenue of immigration for many tech related industries, there will be a lot of takers.