Customers learn the technique of movable-type printing at a printing workshop in Qingdao, east China's Shandong Province, June 21, 2017. Custormers can learn the movable-type printing, one of the world's oldest printing techniques invented in China, in the workshop, which was established in Qingdao in 2013 and has 40 branches all over the country. (Xinhua/Wang Jianhua)