The website was defaced with a protest message:
“Russia invaded our territory to kill people from the People’s Republic. Hack done for the Chinese crew of controversy! Russia must be punished! ! ! Hacked BY: Yu”Yu is described in the article as "a network security enthusiast that has been defacing Chinese, Japanese, Korean, Taiwanese and U.S sites for a while, but had to give up his activities due to college studies."
Chinese hackers deface the Russian Consulate in Shanghai (ZDNet)
Chinese hackers take down Russian Consulate website (Dark Visitor)