Workers assemble a bullet train at the CRRC Qingdao Sifang Co Ltd in Qingdao, a coastal city in East China's Shandong province, May 10, 2018. Home to Tsingtao Beer and home appliance giant Haier, Qingdao is becoming a more attractive place to run important multilateral events. In June, the coastal city will host the 18th summit of the Shanghai Cooperation Organization (SCO). [Photo/Xinhua]