Background

On November1, 1999 was the 50th anniversay of the founding of the Chinese Academy of Sciences. The Chinese Academy of Sciences is the highest academic institute of the state science and technology and a national center of natural science and hi-tech research and development. In the past 50 years, the academy has undertaken China's heavy tasks of basic, strategic, comprehensive and forward research and development. Its staff members, together with scientists and technicians from other fields, have made a lot of breakthroughs and achieved tremendous results which have become the focus of world attention and made great contributions to the economic construction, social development, civilization and progress of the society. Stamps demonstrate some important world-known scientific and technological achievements made by the Chinese Academy of Sciences

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