Scott No: -
Serial number: 2020-20
Values in set: 4
Date of issue: September 19, 2020
Denomination: 480 fen
Designer: Li Chen
Size of stamps: 30 * 50 mm
Perforation: 13
Sheet composition: 12
Sheet Size: 190 * 150 mm
Printing process: Offset and Engraving
Printing House: Henan Provincal Stamp Printing Works

China Post is scheduled to issue a set of 4 commemorative stamps titled "Modern Chinese Scientists (VIII)" on September 19, 2020. The stamps feature the portraits of four scientists: Wang Daheng, Huang Kun, Yu Min, and Chen Jingrun. The total face value of the complete set is 4.80 yuan, with a planned circulation of 6.95 million sets.

Wang Daheng was an applied optical scientist and one of the founders of China's optical engineering. He made outstanding contributions to the development of various large-scale optical observation equipment for national defense modernization and played a pivotal role in advancing China's optical science and metrology.

Huang Kun was a physicist specializing in condensed matter physics and semiconductor physics. He focused his research on condensed matter theory and semiconductor physics, and was one of the pioneers of semiconductor physics research in China.

Yu Min was a nuclear physicist. He solved a series of fundamental problems in the breakthrough of China's hydrogen bomb principle. Having long led the theoretical research and design of nuclear weapons, he made significant contributions to elevating China's nuclear weapons to the international advanced level.

Chen Jingrun was a mathematician. He mainly engaged in analytic number theory research and achieved internationally leading results in the study of the Goldbach Conjecture. In May 1966, he proved the proposition "1 + 2", a result internationally hailed as "Chen's Theorem".

Adopting a realistic artistic approach, the stamps vividly and meticulously depict the classic images of the four modern scientists. The backgrounds of the stamps reflect their respective research directions and achievements: the first stamp features the 150 large-scale cinetheodolite developed by the Changchun Institute of Optics, Fine Mechanics and Physics; the second presents a conceptual illustration of the cover of Huang Kun's original condensed matter physics textbook and the "Huang Equations"; the third shows the successful test of China's first hydrogen bomb; the fourth highlights the important research results obtained by Chen Jingrun in proving the Goldbach Conjecture.

Designed by Li Chen, the set is printed by Henan Post and Telecommunications Printing House using a combination of offset and intaglio techniques.