U-I Oil

U-I oil (Wong Cheung) is pronounced "ooh-eee". External liniment used for muscle ache and pain. Good for warming the area for muscular discomfort that is worse in cold or cold and damp weather. This oil is also great to massage into cold muscles before exercise to help them warm up and to prepare them for stretching.  U-I Oil (Wong Cheung) helps clearing out stagnation after cupping as mentioned in "A Tooth From the Tiger's Mouth: How to Treat Your Injuries with Powerful Healing Secrets of the Great Chinese Warriors" by Tom Bisio.