Yam (in 1968) and then Loong (since 1972) took these four titles along with many other titles of Tang all around the world, including Vietnam (1972) and Las Vegas (1982). However, their reputation as iconic started in mid-1970s. In those years since the 1970 grinding halt, Cantonese film productions in Hong Kong were few and far between. Loong and fellow classmates were limited by design to play characters in these four only and none others, in order to boost the status of these titles of teachers. (This is very common among Yam's generation of performers. Those grew up in the 1960s in Hong Kong keep this running in full force on various platforms funded by the general public, particularly those more talented students, to promote teachers' own status.) Yam had much more under her belt beyond these but other teachers were not in the same shoes. Fame came much faster and through wider audience from cinemas than theaters.