China Geological Library. The Geological Documentation Center of China Geological Survey is also called China Geological Library. According to official website of China Geological Library, China Geological Survey is a public welfare institution directly under the bureau level, which mainly undertakes the protection and service of earth system science and natural resources literature resources, information analysis and research, achievement evaluation, science and technology popularization, geological and cultural research, periodical editing and publishing, etc., and provides public welfare services to the society.