1. During the Manchu Dynasty, the three northeastern provinces were the sphere of influence of Russia, where Russia built railways and garrisons, built some Russian-style cities, and even some immigrants.

2. During the Republic of China, due to the influence of the Russian October Revolution, a large number of Belarusians who opposed capitalism fled to China, and hundreds of thousands of them mainly lived in the northeast of China, and they also established their own residential areas.

3. After World War II, Northeast China was relatively stable, with less wars than Central China. A large number of European companies are developing in Northeast China, especially Jews, so there are more Russian-style buildings.

Extended data:

189 1 year, trans-siberian railway was built in Russia, starting from Ryabin in the west and reaching Vladivostok in the east, with a total length of 7,400 kilometers, which is the longest railway in the world.

When the western line of the railway is built to Upper Houdusse (now Ulan-Ude) and the eastern line is built to Ussurisk, it needs to cross Manzhouli, China (now northeast China). Therefore, the Russian government took various measures to seize the privilege of building the Middle East Railway in the northeast of China.

The Russo-Japanese War brought great disaster to the Japanese people. After the war, the United States intervened and signed the Portsmouth Peace Treaty. Without the consent of the Japanese government, the Oriental Railway was split in two by China and Russia, forming a new pattern of separation between the north and the south.

This Far East Railway has enabled a large number of Russian residents to settle in China smoothly, thus leaving many traces of Russian culture in the northeast.

References:

Baidu encyclopedia-Russia eastward

References:

Baidu Encyclopedia-Nanman Railway