[2] Cheung returned to Hong Kong after completing her studies and became involved in clinical work and advocacy related to mental health, sexual violence, and women's issues.
[2][3] In the late 1970s, Cheung led the "War on Rape" campaign in Hong Kong, to promote awareness, change attitudes, and establish better services for survivors of sexual assault.
[4] From 1996 through 1999, she served as founding chairperson of the Equal Opportunities Commission in Hong Kong, which aims to establish anti-discrimination legislation.
[2][4] Cheung is currently Emeritus Professor of Psychology and Senior Advisor to the Faculty of Social Science and the Hong Kong Institute of Asia Pacific Studies at CUHK.
[5] In 2016, she was awarded the Silver Bauhinia Star, one of Hong Kong's highest civic honors for her long and distinguished public and community service, particularly her significant contributions to the promotion of equal opportunities and elimination of discrimination, as well as her exemplary academic achievements in psychology and her internationally renowned cross-cultural and gender studies.