The change of early Sino-Portuguese relations viewed from the verbal agreement between Wang Bai and Leonel de Sousa;

Discussion On Geology and Isotope Characters of Jiusangou Gold Deposit in Wangqing,Jilin Province;

This paper deals with some difficult points and errors in the documents relating to Wang Lai, a famous mathematician of the Qing Dynasty.

A Research on the shaping of the orthodox image of Wang Puppet Government during Anti-Japanese War Period;