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Modern Chinese Scientists (Series 9)
Supporting Information   
Stamp Title: Modern Chinese Scientists (Series 9)
Serial Number: 2022-20
Piece in Set: 4
Denomination: 4.8 yuan
Date of Issue: 2022-09-07
Designer: Li Chen
Size of Stamp: 50mm×30mm
Perforation: 13
Sheet Composition: 16 pieces
Printer: Beijing Stamp Printing House Company Limited
Printing Technology: Offset intaglio printing

China Post is to issue a set of 4 commemorative stamps entitled Modern Chinese Scientists (Series 9) on September 7, 2022. The images on the stamps are respectively Liu Dongsheng, Cheng Kaijia, Wu Wenjun, Yuan Longping. The denomination of the whole set is 4.80 yuan. 

On the journey of the great rejuvenation of the Chinese nation, generations of scientists, with motherland and people in mind, have braved hardships and made selfless and outstanding contributions to the progress of science and technology, the improvement of people's lives, and the prosperity of the country. In the new era, it is even more necessary to inherit and carry forward the patriotism of shouldering the responsibility of developing China and the Chinese nation, it is even more necessary to carry forward the spirit of scientists  with patriotism as the defining feature.

Liu Dongsheng (1917-2008), geologist and senior academician of the Chinese Academy of Sciences, made lots of achievements in China’s vertebrate paleontology, Quaternary geology, environmental science and environmental geology, Qinghai-Tibet Plateau and polar exploration and other scientific research fields, especially in loess research. In 2003, he won the State Preeminent Science and Technology Award.

Cheng Kaijia (1918-2018), physicist and one of the pioneers of China’s nuclear weapons research, made outstanding contributions to the development and testing of nuclear weapons. He published the first monograph on solid state physics in China. He was the Special Prize winner of the State Scientific and Technological Progress Award in 1985, winner of the Two Bombs, One Satellite Achievement Medal in 1999, and winner of the State Preeminent Science and Technology Award in 2013.

Wu Wenjun (1919-2017), mathematician, made great achievements in the fields of topology and mathematical mechanization and played a linking role in the development of topology. He was awarded the national honorary title of "the People's Scientist" in 2019, and won the first State Preeminent Science and Technology Award in 2000.

Yuan Longping (1930-2021), agronomist, was a world famous expert in hybrid rice breeding, also known as the “father of hybrid rice”. His research on hybrid rice varieties from the 1960s to 1970s gave a boost to agricultural production, resulting in a substantial increase in grain output in both the Chinese Mainland and the world. The rice research under his lead made breakthroughs between 1970 and 2000. He won the Medal of the Republic in 2019, and the first State Preeminent Science and Technology Award in 2000.

This set of stamps is engraved by Hao Ou and Liu Bo and printed by Beijing Stamp Printing House Company Limited with offset intaglio printing technology.

This set of stamps will be available for six months at designated postal outlets nationwide, online mall of China Philately (https://jiyou.11185.cn), the mobile app of China Post, the WeChat Mall for philatelic products in the official WeChat account and the WeChat mini program of China Post Group. To present more information about the stamps, China Post will release their digital contents through the WeChat mini program “Encyclopedia of China Philately and Stamps”, where philatelists can learn more about the stamps via its AR function.

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