Welcome to Lansdale's Self-Defense Systems, home of Shen Chuan, Martial Science. Browse our site to learn more about our school and the eclectic system known simply as Shen Chuan. Professor Joe Lansdale Founder and Grandmaster of Shen Chuan Welcome to Lansdale's Self-Defense Systems, home of Shen Chuan, Martial Science. Browse our site to learn more about our school and the eclectic system ...