Vietnam is located in the eastern part of the Indo-China Peninsula in Southeast Asia. It borders Guangxi and Yunnan in the north, and borders Laos and Cambodia in the west. It is one of the member states of the Association of Southeast Asian Nations and one of the WTO members. Since Vietnam and South Korea, the Eurasian Economic Union, and ASEAN reached a free trade agreement and entered into force, Vietnam's foreign trade has grown substantially, and the foreign import and export market has been expanded. Currently, Vietnam has more than 200 trading partners around the world. After joining the WTO, Vietnam’s foreign trade began to show a surplus. In 2017, Vietnam’s trade surplus reached nearly US$3 billion. In October 2017, its total import value was US$18.5 billion, an increase of 1.4% compared with the previous month. Domestic and foreign companies The total import value reached US$6 billion and US$12.5 billion respectively. This shows that the Vietnamese economy has gradually increased steadily. Vietnam's water supply market has great potential for development. Although 78% of the urban population can enjoy piped water, only 44% of the rural population can enjoy piped water. In more than 600 towns in China, more than 300 towns. It is still impossible to quote the pipeline supply water. In some big cities such as Ho Chi Minh and Hanoi, the water supply still cannot keep up with the rapid development of the city. At the same time, the problem of water pollution is also very serious, which has caused the main concern of the government and is actively taking effective measures to manage the water pollution problem. With the world trend and the support of the government, Vietnam's sewage treatment and related industries will surely become a new market for major companies to compete.