 According to known sources, Yung was the third child in her family, hence she was addressed as "Sam Ka-tse" (, literally "third elder sister") and "Third Lady of the Yungs" ().Born into a wealthy family, Yung resided at Robinson Road, Mid-Levels, Hong Kong Island during her lifetime, while back before World War II, she had been actively involved in the investment market, earning large sums of profits from the investment of securities over the years.Nevertheless, she kept a low profile and lived a frugal life, dressing plainly and had never purchased any new garments in the last ten years of her life.