GENEVA, June 16 -- STATE GRID XINYUAN GROUP CO., LTD. (No. 503, 5th Floor, Building 18, Luomashi StreetXicheng District, Beijing 100052), 国网新源集团有限公司 (中国北京市西城区骡马市大街18号楼5层503), PUMPED-STORAGE TECHNOLOGICAL & ECONOMIC RESEARCH INSTITUTE, STATE GRID XIN YUAN CO., LTD. (9-11/F, Comprehensive Building, No.1, Baiguang Second RoadXicheng District, Beijing 100053), 国网新源控股有限公司抽水蓄能技术经济研究院 (中国北京市...