 The geothermal potential throughout the territory of Vietnam is estimated at about 300 MW.In Vietnam, the tidal energy potential is not large, can only reach 4GW capacity in the coastal areas of the Mekong Delta.However, the large potential area that has not been studied is the coastal waters of Quang Ninh - Hai Phong, especially Ha Long Bay and Bai Tu Long, where the tidal range is high (> 4m) and many islands do dikes for water tanks in coastal lakes and bays.