Leisurely Walk is a very profound Divine Skill, not the kind that can be cultivated by sheer hard practice and brute force. If one is clever, they can master this Divine Skill in less than half a day, but for those with dull innate talent, they may not succeed even if they exhaust their entire lifetime.
The principles of Two Forms and Four Symbols, Yin Yang Eight Diagrams, and Star Constellation Movement actually share common ground, all subtly aligned with the principles of Yin Yang Five Elements.
Jiang Xiaobai's foundational theory in his cultivation was the path of Yin Yang; therefore, even though he knew nothing about the Two Forms and Four Symbols, Yin Yang Eight Diagrams, and the Twenty-four Star Constellations before, it did not hinder his understanding and absorption of new knowledge.