Yixing Yangxian Lake, also known as "Youche Reservoir", is located in Lake Town of Yinan Mountainous Area. It is a man-made reservoir for water storage, flood control and drinking in mountainous area, with beautiful lakeside scenery. Lake, the father of Taihu Lake, here is the first bamboo sea in East China, enjoying the reputation of "the first source of Taihu Lake". This is a typical hilly and mountainous area in the south of the Yangtze River. It is rich in vegetation, dense bamboo forests, numerous caves, streams flowing all day long, and the negative oxygen ions in the mountains and forests are more abundant. It is called "natural oxygen bar" and the local area is also called "Deep Oxygen Territory". It is drunk and beautiful.