Chen Jingrun's main contribution is Goldbach conjecture. The publication of 1966 "Representing Even Numbers as the Sum of the Products of One Prime Number and No More than Two Prime Numbers" (referred to as "1+2") became a milestone in the study of Goldbach's conjecture. And his published results are also called Chen Theorem. This work also enabled him, Wang Yuan and Pan Chengdong to win the first prize of China Natural Science Award with 1978 * *.