Salt has played an important role in people's lives. In ancient China, salt tax was an important part of national tax revenues. Meanwhile, salt was once used as the legal tender in many cultures. Located on the coast of the Bohai Bay, Tianjin Changlu Han'gu Saltern is one of China's most famous sea salt processing companies. Established in 925, Tang Dynasty (618-907), it has a history of nearly 1,100 years. CGTN reporter Li Jianhua and Cao Bing will take you through the salt production line at one of China's biggest salterns and look back at the history of Chinese salt industry.