Visitors learn about products of the Shanxi Helicopter Development and Manufacturing Base at the 12th Expo Central China in Taiyuan City of north China's Shanxi Province, May 21, 2021. The Shanxi Helicopter Development and Manufacturing Base, headquartered in Taiyuan, went into operation recently. The base has a professional helicopter design and research team, with more than 7,000 proprietary designs. At present, the base mainly produces single-engine two-seat and double-engine four-seat helicopters,which serve tourism, agriculture, flight training, fire rescue and medical assistance purposes. (Xinhua/Cao Yang)
