I need to go to notary public office in Beijing by a subway from peking univerity?

There is one called Beijing Haicheng Notary Public Office, located at 3F, Building A of Haojing Mansion, 108, Zhichuan Road, Haidian District.
From Peking University, you could take subway Line 4 for two stops to Haidian Huang Zhuang station. From Exit C, you could walk to Haojing Mansion.