Castro Liu is in his third term as Ward 3 Councillor. He focuses on important subject matters for Ward 3 residents, such as improving traffic safety for school children, stronger neighbourhoods to prevent crime, attracting investments to help create jobs, and branding Richmond Hill as cultural and heritage destination.

A graduate of the University of Windsor's Communication Studies Program, he has held several different positions in the radio and television broadcasting industry, including hosting television talk shows, program director and production director. As co-host of the morning talk show at Fairchild Chinese Radio for more than 15 years, Castro played an integral role in helping the show become the most-listened to Chinese radio program in the Toronto Chinese community. He has appeared in many advertisements and TV/radio commercials and is often invited to emcee major events.

Castro is a strong believer in giving back to the community and is a committed volunteer for numerous charitable organizations and fundraising events, such as the Yee Hong Wellness Foundation, Sick Kids Foundation, the United Way, Mon Sheong Foundation and World Vision Canada. Several organizations, such as the Peel Regional Police Force, World Relief Canada, Carefirst Seniors and Community Services Association, and Chinese Information and Community Services have recognized Castro for his community service. He has been a Richmond Hill resident for more than 15 years and is married with two children.