Lake Tonrisa, also known as Phnom Penh, is located in the north of Cambodia, in the heart of Cambodia, and is the largest freshwater lake in Southeast Asia. The lakeside plain is flat and broad, 500 km long and more than 110 km wide, northwest to southeast, across Cambodia, and the Mekong River crossing in Phnom Penh and Cambodia. It is like a huge green emerald, set on the Cambodian land, for the development and prosperity of the Khmer nation provides a solid resource guarantee, is the Cambodian people's "lake of life".