Exhibitors display their agricultural products at the fair. More than 200 companies and institutions which are engaged in the agricultural technology sector attended the event. [Photo/china.com.cn]

Liu Xuejun, director of the Geriatric Respiration Department at the No 1 Hospital of Shanxi Medical University, delivers a talk on how to prevent and reduce the harm caused by smog at the healthy living section of the event. [Photo/china.com.cn]