《中国现代科学家》

Stamp Title: Scientists of Modern China (8th Set) Serial number: 2020-20 Values in set: 4 (4-1), Wang Daheng, 120 fen, 50 * 30 mm (4-2), Huang Kun, 120 fen, 50 * 30 mm (4-3), Yu Min, 120 fen, 50 * 30 mm (4-4), Chen Jingrun, 120 fen, 50 * 30 mm (1-1s), Scientists [...]