Qingcheng Mountain is a famous Taoist mountain located in Sichuan Province, China. It is known for its lush greenery, serene environment, and numerous ancient temples. The mountain is part of a UNESCO World Heritage Site and attracts many visitors for its natural beauty and cultural significance. The Dujiangyan Irrigation System is an ancient irrigation project also located in Sichuan Province. Built in the 3rd century BC, it is designed to manage the flow of the Min River and distribute water to surrounding agricultural lands. This innovative system is recognized for its engineering excellence and is also a UNESCO World Heritage Site.