She started in the film industry in 1939, cast in antagonistic roles during the black and white film era. It was during this time that she took the stage name of "Law Lan" based on the advice of her boss because he said the name was reminiscent of Shanghai socialites (), and this name better suited the type of roles that she played. In 1971, Law Lan joined
TVB and took part in numerous drama series. Here, she played a variety of different characters instead of only being cast in antagonistic roles as she had previously. She also took part in the popular nightly variety show,
Enjoy Yourself Tonight, which included skits, singing, dancing, and variety games, filmed in front of a live audience. Law has also been cast as a spirit medium in more than 36 Hong Kong horror films. Law's performance as ( fourth granny) in the movie,
Bullets Over Summer, garnered her the "Best Actress" award at the 19th
Hong Kong Film Award in 2000, making her the oldest winner of this coveted award. Law has starred in over 300 movies and television dramas throughout her career. ==Personal life==