Bus timetable of Beijing Metro 16 line is as follows:

Bus at the first stop: depart from Wanping Ancient City at 06:30, stop at Xiyuan, Suzhou Street, Wanquanhe Road, East Gate of Yuyuantan, National Library and East Gate of Beijing Zoo, and finally arrive at Xihongmen.

During the peak period, in addition to all bus stops, the 1 express will be added in the morning and evening peak hours, stopping at six stops, namely Xiyuan, Suzhou Street, Wanquanhe Road, East Gate of Yuyuantan, National Library and East Gate of Beijing Zoo.

The above information is for reference only, and the specific timetable may change. I suggest you check the real-time information in official website of Beijing Metro.