Cinnamon twig "Gui Zhi" makes such an wonderfully aromatic and invigorating tea all by itself. Gui Zhi works great with other herbs that need some flavorful assistance. Cinnamon twig is used for increasing circulation and treating colds , influenza and upper respiratory issues. This Cinnamon twig is excellent quality and is definitely a must have. Thank you Fu Heng Herbs for excellent service high quality products and fast shipping.