Qingdao Re-green Biological Technology Co.,Ltd, which is located Qingdao city. Our factory is located in Binzhou city of Shandong Province.We mainly produce and deal in high concentrated liquid fertilizer with the macro-element, secondary-element and trace element, which contain amino acid, humic acid, alginic acid, taurine, chitin and so on.Our core products are Potassium Cacium Zinc solution plus NK,Potassium Phosphite Solution,Potassium Polyphosphate Solution,Amino Acid and Potassium Polyphosphate Solution,Taurine Peptide Solution,Sugar Alcohol Calcium Solution,Calcium Boron Solution.