The well-known, annual Bun Festival of Cheung Chau island, Hong Kong.

Pamphlet cover for 1967 Bun Festival

Here's a page with image of a Bun Festival leaflet, produced by the Cheung Chau Rural Committee in 1967. The bun towers are just beside the waterfront (if they're in same location as nowadays, shows there has since been considerable reclamation).