Why can't the British colonize other areas and digest it into their own land (when the country is weak, it will be independent), but China is different, Xia Dynasty's.

The most powerful thing in China is the spread of culture, not immigration. Stavri Anoos, a famous historian, wrote in his Global History: "The development of China is different from what happened after the arrival of Aryans, Muslims or British people, and there is no obvious sudden stop. Of course, many nomadic tribes invaded China and even took some dynasties instead; However, it was not China people who were forced to accept the language, customs or animal husbandry economy of the invaders. On the contrary, it is the aggressors themselves who are always quick and thorough in China. " Of course, what we are talking about here is the invasion of ancient China by Mongolian and Turkic nomads, but from the fact that the invaders were quickly assimilated, we can see the advanced degree of ancient Chinese civilization. The best way to maintain the continuous and stable rule of a certain area is to spread culture, let the local people accept our culture and have a sense of cultural identity. Those ethnic minorities in ancient China, who spoke Chinese like the Han people and read the Four Books and Five Classics, naturally thought they were part of Chinese civilization.

The British colonial expansion is another matter, which is entirely for plundering resources. The colonial people were cruelly oppressed and exploited, and they did not even have the most basic human rights. How to talk about cultural identity?