You can apply for an apartment in Zhongguancun Talent Apartment of UCAS and you may also choose to book a hotel by yourself before arrival. 

Zhongguancun Talent Apartment 

Price: 140RMB per square meter and the size of the flat ranges from 80 square meters to 96 square meters 

Note: Formal application is needed

Address: Side Road of N. 4th Ring Road West, Haidian District 

Park Plaza Beijing Science Park 

Price: 700 RMB-1300RMB

Address: 25 Zhi Chun Road, Haidian District, Beijing 100191, China

Contact: +86 10 82356699

Route: You can reach the hotel by car within 35 minutes from Beijing Capital International Airport. 

Wuke Hotel 

Price: 400-500 RMB

Address: No.8, Zhongguancun South 3^rd Street, Haidian District

Contact: 010-8264 9482