China and France are UN (United Nations) Security Council members. They are blocking a vote to declare a genocide in Darfur, because of their oil interests in Sudan.
China National Petroleum Corp.
China's nationalized oil company has invested heavily in Sudan to meet China's constantly growing oil needs.
PetroChina
PetroChina is a subsidiary of China National Petroleum Corp.
Shell China Exploration and Prod. Co.
Shell China Exploration and Production Co. works with PetroChina to jointly develop natural gas fields in China.
Shell
Shell is the parent company of the above Shell China Exploration and Production Company and your avenue to effect change.