Industrial tourism: Changlu Hangu Salt Industry Exhibition Hall.

Salt is divided into sea salt, lake salt, and well salt, with sea salt being the first to be discovered and used by humans. Tianjin is home to the famous Changlu Hangu Salt Field. Hangu is located on the northwest coast of the Bohai Sea, named for its water and thriving because of its salt. According to the "Hangu Chronicles," Hangu was an ancient salt stove site, where salt was boiled from the Han Dynasty. The salt industry began in the Later Tang Dynasty, developed in the Liao Dynasty, and flourished in the Jin Dynasty. The predecessor of Hangu Salt Field was "Lutai Field," which was built in the third year of the Later Tang Dynasty (925 AD). The sea salt produced here is known as "Lutai Jade Sand" and was a tribute salt in the Ming and Qing Dynasties. It is the only "China Time-honored Brand" among China's salt production enterprises, the "001" designated edible salt production enterprise, and one of the earliest protected areas for natural sea salt products in northern China. The Salt Industry Exhibition Hall is divided into six parts based on time: Millennium Lu Salt, Jade Sand Splendor, Innovation and Strength, Striving Forward, Chasing the Future, and Salt Song Sea Charm. Relying on the long history of Hangu Salt Field and taking the development of Tianjin's salt industry as a clue, the exhibition hall showcases the contributions of Changlu Salt and Tianjin to agricultural and industrial civilization, local customs, salt and fishing culture, and the relationship between salt and human health through pictures, text, objects, videos, and explanations. Tianjin Changlu Hangu Salt Field is a magical place that combines history and nature, famous for its unique thousand-year-old salt culture and charming colorful salt fields. It is not only a witness to China's ancient salt industry but also a great tourist destination!