Major Chinese energy companies are in advanced talks with US exporters to secure long-term liquefied natural gas (LNG)supplies, as soaring gas prices and domestic power shortages heighten concerns about the country’s fuel security, several sources said. At least five Chinese firms, including state major Sinopec Corp and China National Offshore Oil Company (CNOOC) and local government-backed energy distributors like Zhejiang Energy, are in discussions with US exporters, mainly Cheniere Energy and Venture Global, the sources told Reuters.…