Catching and cooking Lianzhou Grain Worms, also known as standing grain worms in Lianzhou Town, can be dated back to the end of the Song Dynasty (960-1279). This is also a custom in Doumen District and is common in Chinese medicine.

During the great tides of the third, fourth, eighth, and tenth lunar months, a large quantity of grain worms break through the soil from the roots of water paddies and float upon the surface of the Hutiaomen Waterway. There, farmers catch them with well-woven bamboo traps during the wee hours. As grain worms depend on high-quality water, rivers fit for catching them are disappearing.