Citric Acid, Xanthan Gum, Vitamin C Ascorbic Acid manufacturer / supplier in China, offering High Quality Humic Acid Liquid Fertilizer for Soil Improvement and Plant Growth, Boron-Zinc-Molybdenum Liquid Fertilizer for Soil Improvement and Plant Growth, Compound Liquid Fertilizer Potassium Phosphite Liquid Fertilizer and so on.