Việt Nam has great potential for renewable energy sources such as hydropower, wind power, solar power and biomass power. For HCM City, Sơn also suggested the city's leaders to review the progress and problems when implementing renewable energy projects, thereby contributing to complete the policy framework on national renewable energy development. Many enterprises produce solar power to sell to EVN, while EVN's commercial price of solar power is only 7.2 cents/kWh. The State needs to have more open and adequate guidelines and policies to create a stable investment environment for renewable energy projects, he said. It also is necessary to have more appropriate solutions and mechanisms for developing renewable energy projects.