Salt has played an important role in people's lives. In ancient China, the salt tax was an important part of national tax revenues. Meanwhile, salt was once used as a legal tender in many cultures. Located on the coast of Bohai Bay, Tianjin Changlu Han'gu Saltern is one of China's most famous sea salt processing companies. Established in the Tang Dynasty (618-907), it has a history of nearly 1,100 years. Join CGTN reporter Li Jianhua and Cao Bing to take a closer look at the salt production line