Energy conservation first should be given full play to the field of energy-efficient buildings. Building energy consumption takes up around 35% of the total energy consumption in the society. New technologies should be adopted to provide new services. For cooling in summer and heating in winter will be supplied by resources other than directly burning primary energy. Infrastructure in the cities along the One Belt One Road mainly deals with household refuse, sewage treatment and other city services. Many countries along this route are still lagging behind in these areas. Some countries in South East Asia are far behind China in refuse and sewage treatment. We are now planning our strategic layout and bidding for those services.