uoer FN-GLP-10 diatomite filters have been promoted to some cities in Guangdong province, such as Zhongshan, Jiangmen, and Kaiping, where many soybean sauce plants located. In December 2014, FN-GLP-30 diatomite filter was assembled to Heshan Donggu Flavoring Food Co., Ltd., starting a new chapter of clarification of Southern-Chinese-style of soybean sauce.