Yellow River Fine Chemical Industry Xinxiang Yellow River Fine Chemical Industry Co., Ltd. is a leading fluoride manufacturing base in China. With the registered trademark of "Kaoshan", our leading product, namely Potassium Fluoride , enjoys Rank 1 in terms of amount of the production and sale in the world. Located in the wide and rich Central Plains, close to the capital city of Zhengzhou, and the ancient city Kaifeng, with Jingguang Railway, National Road 107 and Jingzhu motorway passing by, the company enjoys convenient transportation facilities.