APHH is an international collaborative project to examine the emissions, processes and health effects of air pollution in Beijing.

The four research themes of APHH-China are:

• (1) sources and emissions of urban atmospheric pollution
• (2) processes affecting urban atmospheric pollution
• (3) exposure science and impacts on health
• (4) interventions and solutions to reduce health impacts 

Themes 1 and 2 are closely integrated and support Theme 3, while Themes 1-3 provide scientific data for Theme 4 on the development of cost-effective solutions. A key activity within APHH-Beijing was the two month-long intensive field campaigns at two sites: (i) central Beijing, and (ii) rural Pinggu. The coordinated campaigns provided observations of the atmospheric chemistry and physics in and around Beijing during November – December 2016 and May- June 2017. The campaigns were complemented by numerical air quality modelling and air quality and meteorology data at the 12 national monitoring stations in Beijing.