Tai Chi Ruler Bonus Exercise | Sifu Dan Ferrera video Added: Nov 2015 | Last update: Jan 2017 Sifu Dan Ferrera walks through some bonus exercises for the Advanced Tai Chi Ruler Course on DevelopYourEnergy.net. For more information go to http://developyourenergy.net/tai-chi-ruler-advanced/ Tags: martial tai chi ruler tai chi Tai chi chuan