A worker operates robots for the automatic welding of workpieces at the smart factory of Fujian Tietuo Machinery Co in Quanzhou, a city in East China's Fujian province. Last year, the company carried out digital upgrades and introduced advanced computer numerical control intelligent equipment and operation monitoring systems such as intelligent fiber laser cutting machines, robotic cutting production lines, and robotic welding equipment. In recent years, industrial robots and service robots have accelerated their popularity in Quanzhou, helping the transformation and upgrading of the manufacturing industry. [Photo/qzwb.com]