Neither of these countries {China,Russia} is "atheistic".
*My addition in {}
http://en.wikipedia.org/wiki/Religion_in_China
"The People's Republic of China was established 1 October 1949. Its government is officially atheist, having viewed religion as emblematic of feudalism and foreign colonialism, and maintained separation of state and the church. This changed during the Cultural Revolution, in 1966 and 1967. The Cultural Revolution led to a policy of elimination of religions; a massive number of places of worship were destroyed."
http://en.wikipedia.org/wiki/State_atheism
"State promotion of atheism as a public norm was first practiced during a brief period in Revolutionary France. Since then, such a policy was repeated only in Revolutionary Mexico and some communist states. The Soviet Union had a long history of state atheism, in which social success largely required individuals to profess atheism and stay away from houses of worship; this attitude was especially militant during the middle Stalinist era from 1929–1939. The Soviet Union attempted to suppress public religious expression over wide areas of its influence, including places such as central Asia."
"In the Marxist–Leninist interpretation of Marxist theory, developed primarily by Russian revolutionary Vladimir Lenin, religion is seen as negative to human development, and communist states that follow a Marxist–Leninist variant are atheistic and explicitly antireligious."
as I said to ravens, you may want to educate yourself before commenting.
Indeed.