Kathmandu. A massive energy project has been established in Tai'an City, Shandong Province, eastern China, giving a new look to the mining area.This energy center is capable of storing energy for eight hours and generating electricity for four hours. Its annual production capacity is 460 million kilowatt-hours, which can meet the annual electricity needs of more than 200,000 households.This project is the first commercial 'compressed air energy storage' project operated by China Energy Engineering Group Co., Ltd. It uses the underground caves of old salt mines as 'energy storage'.In recent years, China has made significant progress in renewable energy. By...