Abstract: Huang Yuanwei,an influential official in Beiyang Government in the beginning of Republic of China,was the son-in-law of KangGuangren,one of the most important leaders in the Hundred Day's Reform.Due to his privileged relationship with Kang Youwei,Liang Qichao,Chen Zhaochang and other Cantonese celebrities,his home letters to his wife Kang Tonghe became an important resource to study the social and political activities of Kang Youwei,Liang Qichao and other Cantonese celebrities from 1913-1916.These letters are also priceless in studying the political struggles among different parties within Beiyang Government.

Key words: Huang Yuanwei, Huang Yuanwei's home letters, Kang Tonghe, Kang Youwei, Liang Qichao, Chen Zhaochang, party politics in the early period of the Republic of China