"Sigung Leung Cheung’s kung fu training was very rigorous and intensive. During his first two years as a student, he only trained to perfect the systems stances and other basic techniques. In later days, his stances were so strong that the ground would shake when he rooted in them, something that was witnessed at countless demonstrations. At over sixty years of age, he was still training his internal power on huge trees in Centennial Park in Sydney, making the upper branches shake with every strike. "
Clearly he is authentic.