PHK Intro Kit already covers strength, mobility, and flexibility in various exercises like stances, Chinese squats and Chinese pushups. Bonus #1 focuses on one of the most common stretches in Chinese martial arts called "Old Monk Takes Off Shoe" (Lou Sang Tyut Heu), also called “Frontal Leg Press” (Jing Ngaat Teui) or “Kissing the Shoe” (Jing Man Heu).