July 8, 2017 Randy Brown Mantis Boxing Cracking the Black - Vincent Tseng July 8, 2017 Randy Brown Mantis Boxing On July 8, 2017, Vincent Tseng was awarded his Black Belt in Mantis Boxing (Tángláng quán 螳螂拳). Vincent arrived at our wŭguān (martial hall) in 2006 at the age of 16. I still recall our first phone conversation...