Study on Envoys to Annam in the Rule of Hongwu Emperor 1368-1398;

Protocol of Japan Palace during the Period of Bohai Envoy Visiting Japan;

Zuo Maodi, a famous patriotic envoy in the South Ming Dynasty,would rather die than bring disgrace to the country.

Because Keshigs had a high social position and a close relation with the royal family in the Yuan dynasty,they were often dispatched as envoy to fulfill their missions like the persuasion of the enemy to surrender,the searching for treasures abroad,the appeasing of the princes and so on.

On the Manifestations and Characters of fang guo s submission to shang dynasty;

In his dynamic adopting to big feudal family,Gao Juexin developed his tendency of submission which made him sacrifice a lot.

During the period from 1368 when Ming Dynasty was founded to 1637 when Korea yielded obedience to QING Dynasty and ended the suzerain-vassal relationship with Ming Dynasty, Korean envoys left us a large number of travel notes about China, and these notes are called "works of travel accounts to Ming Dynasty".

In Chao Tian Lu and Yan Xing Lu written by North Korean envoys,29 poems praising Beijing Dongyue Temple have been discovered by now,demonstrating the style of Beijing Dongyue Temple during Ming and Qing Dynasties,and expressing the complexity of the poets\' inner feelings,thus revealing their important values in respects of literature,customs,history and aesthetics.