Will the large number of immigrants from China lead to the gradual change of the main population composition of some countries and gradually become a colonial-like situation?

Actually, I don't think your metaphor is appropriate in itself. Colony refers to one country's political and military control or plunder of another country's economy and resources. What you are talking about may be called racial integration, cultural integration or conflict. There are also foreign countries that have immigration quotas every year and do not want to immigrate indefinitely; For example, if China wants to immigrate to Canada now, besides your own conditions meeting the requirements of other countries, you have to wait in line for a long time (currently more than three years). The main reason is that there are many people who want to immigrate but the quota is limited. Finally, if you immigrate successfully, then you are a native of that country. How can aborigines colonize aborigines?