The role of Sha Seng in TVB's "Journey to the West 1996" once helped Mui Changcheng become a familiar face to Hong Kong (China) movie lovers.
A major turning point in Mach Truong Thanh's career came when he was continuously assigned more in-depth roles on television. From the character Du Than Chi in "Demi-Gods and Semi-Devils" to Cao Luc Si in "Restoring the Mountains" or the villain lines in many other films, his name gradually gained more attention from the audience.

The peak of the actor's career was in 2010 with the role of Luong Phi Pham in "Nghĩa hải hào tình". This role helped him win the TVB Best Supporting Actor award, becoming one of the highly appreciated faces in Hong Kong (China) television dramas at that time.
However, when his career was going smoothly, Maggie Cheung's family encountered serious financial upheavals. His wife invested at a loss and was involved in a fraud case, causing the debt to increase to about 2 million Taiwan dollars. The incident led to many legal disputes, and directly affected the actor's work.
According to Hong Kong (China) media, creditors once came to TVB headquarters to demand money, causing the station's image to be affected. After that, Maggie Cheung was cut off from television appearances, lost advertising contracts and gradually left large projects.
In 2016, he terminated his contract with TVB before returning in some supporting roles and television shows. By 2020, the actor officially left TVB, falling into unemployment.

In recent years, Mach Truong Thanh has tried to do business in restaurants, tea stalls and eateries but has not achieved the expected results. To maintain his life, he used to do many different jobs such as delivering goods, serving eateries and packaging goods.
Currently, at the age of over 50, the actor still sells fast food restaurants and milk tea shops himself to save on employee costs. In addition to business hours, he also regularly livestreams to interact with audiences and maintains limited artistic activities.