Cheung Chau is a lovely island in Hong Kong. We previously posted about a day trip there.
Cheung Chau is most famous for its annual bun festival. It is a very busy festival rooted in local tradition and a popular free sight for visitors and locals alike. The tourist board has a detailed explanation of the Bun Festival on its website.
You can catch parts of the Bun Festival throughout April and into early May. Dates are here:
For details on how to get to Cheung Chau, read this.