Tong Guan San - Open the Gate Formula by Formulas $ 49.00 Granules - 100 grams - $ 49.00 Whole Herbs - 300 grams - $ 49.00 Select option Granules - 100 grams Whole Herbs - 300 grams 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Tong Guan San Open the Gate Formula