Who knows what preparations are needed to immigrate to Russia?

It used to be that if you married a Russian woman, you could immigrate to Russia. At that time, many Chinese people wanted to immigrate to Russia. They married Russian women. After getting Russian citizenship, they divorced the woman and gave her some points. Money. Later, the Russian government saw that this was not working and canceled the policy of obtaining Russian citizenship by marrying a Russian woman. As far as I know, you have to live in Russia for more than 10 years and work in a Russian company, so you can marry a Russian woman, which is very troublesome. I have an acquaintance who has been in Russia for 15 years. He got married in Russia and his children are broken up. It seems that he does not have a Russian household registration.