2/kloc-will China become an immigrant importing country like the United States and Canada in the 20th century, and will the dominant position of Dahan culture be weakened?

The United States and Canada have no inherent culture (the culture here includes bureaucracy and demographic composition), so the early immigrants merged (but in the modern white mainstream society, the United States and Canada, such as Chinese, African-American and Japanese immigrants, have a contradiction-racial discrimination with the white mainstream society, and because their own integrated society has certain adjustment ability (the main electoral system, the parade-Martin Luther King). This makes the identity of immigrants have a relatively fast matching state. Of course, whites in the United States and Canada are still the mainstream, and the assimilation of Han nationality in China's history is bottom-up assimilation (Wuhu and Yuan Meng). If there are a large number of immigrants in China, the current population and system will not have much influence on the inherent culture.