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As large oil company operating worldwide, PetroChina has been consistently committed to the belief that humanity and the environment on which it relies for existence are the two most precious resources in the world. PetroChina regards it as the main respo
As large oil company operating worldwide, PetroChina has been committed committed to the belief that humanity and the environment on which it relies for existence are the two most precious resources in the world. PetroChina regards it as the main respo