Why is intermarriage common in the Russian Far East and Northeastern China?

This is due to the development of the Russian Far East. In their hearts, the people of the Russian Far East are people abandoned by the government. They were restrained by the government or intentionally moved to the Far East during the Stalin era, so , now local people will immigrate to Eastern Europe as long as they have a little capital. If they don't have enough capital, they will choose to combine with the Chinese.

The Chinese have infiltrated the Far East into a sieve, doing business in the Far East, reclaiming land, and stealing timber. However, few people pay taxes to the Russian government. They all return to China after making money. The Putin government has thought of many ways to retain Chinese people doing business in the Far East and become Russian citizens. It even caused a sensation last year by giving away 1 hectare of land for free.