Papermaker Huang Xunwu processes the materials of paper in Qiliang village of Zhouzhi county in Xi'an city, Northwest China's Shaanxi province, Jan 19, 2018. The village attracted a lot of tourists by adopting traditional Chinese papermaking techniques. Villager Liu Xiaodong developed paper out of panda waste in 2016 which vitalized the method of paper making. The paper of Marquis Tshai is a kind of paper invented by Cai Lun during the Han Dynasty (202 BC-220 AD) which is made of mulberry and other plant fibers. [Photo/Xinhua]

Papermaker Jiang Luyin arranges the papers of Marquis Tshai that have just been dried in Qiliang village of Zhouzhi county in Xi'an city, Northwest China's Shaanxi province, Jan 19, 2018. [Photo/Xinhua]

Photo taken on Jan 19, 2018 shows semi-manufactured papers of Marquis Tshai in Qiliang village of Zhouzhi county in Xi'an city, Northwest China's Shaanxi province. [Photo/Xinhua]

Photo taken on Jan 19, 2018 shows panda poop (L) and the papers of Marquis Tshai made from it in Qiliang village of Zhouzhi county in Xi'an city, Northwest China's Shaanxi province. [Photo/Xinhua]

Papermaker Liu Xiaodong shows the papers of Marquis Tshai he made in Qiliang village of Zhouzhi county in Xi'an city, Northwest China's Shaanxi province, Jan 19, 2018. [Photo/Xinhua]

Papermaker Jiang Luyin takes the papers of Marquis Tshai that have just been dried in Qiliang village of Zhouzhi county in Xi'an city, Northwest China's Shaanxi province, Jan 19, 2018. [Photo/Xinhua]

Papermaker Liu Lijie cuts the materials of paper in Qiliang village of Zhouzhi county in Xi'an city, Northwest China's Shaanxi province, Jan 19, 2018. [Photo/Xinhua]