Huang Bingqiang puts the final touch on a Tao inkstone at Shangchuan village in Lanzhou city, Northwest China's Gansu province, March 21, 2018. Huang has been a dedicated maker of Tao inkstones for 15 years. With a 1,300-year-old history, Tao inkstones, made of stone found on the bed of the Tao River, is known as one of four famous inkstones in China and favored by traditional Chinese scholars. Huang needs up to ten days to finish a Tao inkstone, an act that involves tens of time-consuming steps. [Photo/China News Service]