Russia talks a lot about friendship with China, but it is all talk. In reality, Russia is scared and hates China, and does what she believes will keep her from sending people into Siberia to try and make territorial claims, as this is one of her great fears. The COVID-19 epidemic has been in this case an interesting bonus for Russia, as in the name of stopping the spread of the virus she has banned all Chinese citizens from travel to Russia starting February 20th.
Russia will suspend entry of Chinese citizens to its territory starting from Feb. 20, Russian authorities in charge of coronavirus prevention said on Tuesday.
The suspension will be for Chinese citizens entering Russia for employment, private, educational and tourist purposes. The suspension will be temporary, the statement said. (source)