Bao'an County
In 1919, Cheung returned to reside in , Huiyang in Guangdong Province. During the winter of 1929, Cheung opened his first martial arts school and a traditional Chinese medicine clinic in Pingshan Town, Bao'an County, and continued to promote the Jook Lum system. Wong Yook-Kong (), Lum Wing-Fay (林榮輝; 1910–1992; also known as Lum Sang or "Mr. Lum", 林生) and Lee Wing Sing () are some of his students from that period.