Cheung Chau's famed, annual Bun Festival.

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).
http://www.picturethiscollection.com/exhibitions/detail/000000762/page1/

Plastic buns, plastic wrappers, metal bun tower - bring on Disney.

News today re plastic buns to be used on the big "bun tower" that's used for the climbing contest.

Comes soon - a year or two - after the buns placed on towers were all put in plastic wrapping - by government decree, for health reasons (even though I've heard people [mostly] don't eat the "lucky" buns from the bun towers).