Mu Xin (Chinese: 木心) is the pen name of Sun Pu (Chinese: 孙璞; February 14, 1927 - December 21, 2011), courtesy name Yangzhong (Chinese: 仰中), a Chinese painter, poet and writer. His works draw on both Chinese and Western traditions. The pen name Mu Xin is derived from Buddhist thoughts, meaning an educator with true heart.