Nguyen Trung Truc was a leader of the Anti-French Colonist movement of Vietnam from 1861 to 1868. He is known for two great military achievements: 1) The sinking of the French warship named Esperanza (December 10, 1861) and 2) Taking back Rach Gia from the French on June 16, 1868. Nguyen Trung Truc was eventually captured on Phu Quoc Island, imprisoned, and executed. There is a temple devoted to him at Ganh Dau Village on Phu Quoc Island, Vietnam.
One of the first things you will notice at the temple is a variety of different colored bark laid out on mats and left to dry. These barks are actually used to treat a variety of illnesses and are available for free for all guests. Just ask for a small bag and grab a handful.
The bed Bark is called “Cao Dang” and it is used to treat headaches. The lighter yellow bark is called “Phuch Linh” and it used for heart aches, insomnia, and for urinary tract infections. The darker yellow bark is called “Do Trong” and it is used to treat arthritis. The way you process the bark is by boiling it in water, filtering out the bark, and then drinking the juice or “tea”. Some also put the bark in alcohol, usually rice wine, and let it sit for several days before consuming it.