PetroChina’s logo is seen at a petrol station in Beijing, China, March 21, 2016. REUTERS/Kim Kyung-Hoon/File Photo GLOBAL BUSINESS WEEK AHEAD Register now for FREE unlimited access to Reuters.com Register SINGAPORE, Sept 7 (Reuters) – State energy giants Gazprom (GAZP.MM) and China National Petroleum Corporation (CNPC) signed several agreements on […]