听力原文: Shell Group says so far it has invested over 1.6 billion USD in China. The figure will soar to 5 billion within the next few years. Shell said the energy resource supply of China will double around 2020. The country will need more foreign capital for upstream petroleum products, and natural gas projects. Shell is quite willing to take part in the projects. Shell plans to cooperate with PetroChina in the west-east gas transmission project. The total investment will reach USD 8 billion. Shell cooperated with China National Offshore Oil last year in Nanhai Petroleum Chemical project. How much has Shell invested in China so far?