Tongling Runcheng Trading Co., Ltd. Tongling Runcheng Trading Co., Ltd. was established in April, 2007, specializing in both domestic & international trading of chemicals. Our main products include sodium silicofluoride, potassium silicofluoride, ammonium hydrogen sulfite, solid ammonium sulfite, titanium dioxide, iron oxide black, iron oxide yellow, pyrite, etc. These products have already been exported into more than 20 countries and districts. Our customer group in Europe, mid-east and south-east Asia is expanding owing to our good reputation. In the principle of mutual benefit and win-win, we will provide you the best service so as for a prosperous future