Mayway's Plum Flower Yin Chiao Chieh Tu Extract Tablets available in two bottles each containing 100 tablets. Also called Yin Chiao Plus, Yin Qiao Jie Du Wan, Yin Chiao Chieh Du Wan, or Yin Chiao Chieh Tu Pien, is one of the most well known formulas in the Chinese herbal system. Yin Chiao is highly-regarded for its ability to nourish and strengthen the body. Chinese Medicine suggests taking immediately after the onset of common cold or flu symptoms. Chinese herbalists believe that cold/flu germs remain on the surface for a short period of time after entering the body. It is during this critical time that Yin Chiao can be most effective in reducing body stress.