A tea art specialist dressed in costume of Tang Dynasty (618-907) shows the way of drinking tea popular among then Tang people during a Tang-styled tea cooking show in Xi’an, capital of Northwest China’s Shaanxi province, April 18, 2018.[Photo/Xinhua]

A tea art specialist (C) dressed in costume of Tang Dynasty (618-907) mills tea cake with a roller during a Tang-styled tea cooking show in Xi’an, capital of Northwest China’s Shaanxi province, April 18, 2018.[Photo/Xinhua]

A tea art specialist dressed in costume of Tang Dynasty (618-907) adds salt into the boiler for tea cooking during a Tang-styled tea cooking show in Xi’an, capital of Northwest China’s Shaanxi province, April 18, 2018. [Photo/Xinhua]