Changlu salt field

The Changlu salt field (长芦盐场) lies on the Bohai coast of Tianjin and is the largest sea-salt producing area in China, a quarter of the national output. Its name first appears in the Shuijing and its commentary, given because the place lay by water with much reed, and in the Yuan dynasty an office was set up here to oversee production, after which Changlu became the name of the whole salt district of the Bohai shore. The works lie on flat ground with a wide beach, a short rainy season and strong evaporation, conditions that favour the evaporation of seawater. The Hangu field, one of the older parts, became one of the first Chinese time-honoured brands in 2006.