Filter powder is a special rice noodle in Rongan County and Rongshui Miao Autonomous County of Liuzhou City, Guangxi. Since the Qing Dynasty, local residents have had the custom of making filter powder at home. Legend has it that in order to pray for rain, people use filtered powder to sacrifice, because the filtered powder is as slender and continuous as rain.
It was not until the Republic of China that the first filter powder shop opened that filter powder became popular in the local area. Since then, filter powder has become the favorite rice noodle of local people. Wanderers who go out to study and work in other places can't eat filter powder, and when they get home, they will definitely eat a bowl of hometown flavor to relieve their homesickness.