Then, Yuen Kay Shan said because it was his passion, demonstrated and gave him a slight beating so Sam was convinced that he could learn a lot from him and was now his disciple. Sum Nung developed a great reputation toward the quality of his Kung Fu, he often had to fight to defend himself against the discrimination for being a foreigner. In 1943 he began teaching in Foshan in the village's deep temple to students like Sum Jee.