If you go back to the landlord, Russian is proficient. But not like the first floor said. The first floor is the level of spoken Russian in China. That's highly irregular. In Russia, even the whole world, the Russian proficiency is divided into four levels: Russian examination institutions (трки) are established by the Moscow Examination Center and recognized by the state to test and certify the Russian proficiency of Russian learners all over the world. Russian level 1: Entry-level students can study Russian level 2 in any Russian university as long as they get the first-level certificate; Upgrade students can only get diplomas and degrees from Russian universities if they get the second-class certificate, and they can engage in the third-class Russian work; only when they get the third-class certificate can they be promoted to the expert level in their jobs. Russian CET-4: Obtaining the CET-4 certificate of mother tongue level means that you can speak Russian as well as Russians. The above is the international division of Russian proficiency. I studied in Russia and got a second-class certificate in English. But why the Russian hierarchy in our country is so special, I am also puzzled. I hope to connect with the world as soon as possible. Answer over.