A worker operates intelligent manufacturing machines producing elevator components at a factory in Hai'an, Nantong, a city in East China's Jiangsu province, on April 29. As the largest county-level producer of elevator components in China, Hai'an has been encouraging elevator companies to modernize and transform intelligent manufacturing, introduce advanced production equipment, build intelligent production workshops, and develop innovative elevator products. The city's elevator industry is now at the mid to high level, and manufacturing quality has greatly improved. [Photo/IC]