A member of the United Democratic Party, he was the first ethnic Chinese person to hold the post of President of the Senate of Belize.

[3] Under his tenure as president, the CAB worked closely with the Belize Police Department on issues of crime prevention, and also donated several motorcycles.

[4] He also served in a variety of public positions, for example sitting on the Belize District Liquor Licensing board and working as an occasional court translator.

[7] In August 2010, PM Dean Barrow appointed Chang to the Senate and made him acting president, to fill in for Andrea Gill who was on maternity leave.

In the run-up to the election, an unknown person released a forged letter claiming to be from Chang, promising to distribute land in Belama to the Belize Chinese Association in exchange for campaign contributions.