This document summarizes the philosophical ideas of Lao Tzu, a 6th-5th century BC Chinese philosopher who authored the Tao Te Ching. Some of his key concepts discussed include Wu Wei or non-doing, which advocates effortless and natural action by flowing with the Tao or nature. Lao Tzu also believed the weak can overcome the strong through softness. The document then discusses how some of Lao Tzu's ideas like Wu Wei and concepts of emptiness and interconnection were compatible with and influential on later Buddhist teachings introduced to China. Both philosophies saw harmony with nature as important.