In the Chinese world, the Zhaopiye River was mistakenly referred to as the "Chaonan River", and Westerners have long mistakenly referred to as "Mae Nam". In fact, "South of Wei" (แม่น้ำ) means "river" in Thai. The Zhaopiye River is one of the largest rivers in Southeast Asia, with a total length of 1,352 kilometers (from the source of the riverside to the sea mouth), and the width of the northern Bangkok can reach 700-800 meters (in the rainy season), and the basin area is 150,000 square kilometers. Approximately one-third of Thailand's land area. The Zhaopiye River (Thai: แม่น้ำเจ้าพระยา, Maenam Chao Phraya) is the main river in Thailand. The name "Zhaopiye" (เจ้าพระยา) comes from a senior title in ancient Thailand. It originated in the northern mountainous region of Taibei, and the river named "Zhaopiye" began near Nakong Shawang at the intersection of the riverside, the Lihe and the Yonghe River. It flows south about 40 kilometers. It is divided into two branches near Chaina. The western branch calls him the real river, the eastern branch is the Zhaopiye River. Crossing Bangkok to Siam Bay. In terms of water or length, the Zhaopiye River is the largest river in Thailand.