And of course, the immortal.

[_monia_]

喀秋莎

正当梨花开遍了天涯河上飘着柔曼的轻纱喀秋莎站在峻峭的岸上歌声好像明媚的春光姑娘唱着美妙的歌曲她在歌唱草原的雄鹰她在歌唱心爱的人儿她还藏着爱人的书信啊，这歌声姑娘的歌声跟着光明的太阳去飞吧去向远方边疆的战士把喀秋莎的问候传达驻守边疆年轻的战士心中怀念遥远的姑娘勇敢战斗保卫祖国喀秋莎爱情永远属于他正当梨花开遍了天涯河上飘着柔曼的轻纱喀秋莎站在峻峭的岸上歌声好像明媚的春光

I also found Harry Potter and the Philosopher's Stone in Mandarin, but I'll have mercy and won't post it here.