Hainan online
Hunchun is China is the only border city in the border between China, Korea and Russia. It can go to Russia directly by car. Because of the convenience of transportation, many young rural men in Hunchun go to Russia to work and start businesses, and some even become the "son-in-law" of the Russian women.
a lot of Russia's wealthier single woman families do not want their daughters to marry abroad. Therefore, the "son-in-law" must leave her country, and the children born can only follow the woman's surname.