Buns with a plastic covering to protect from the rain are seen on a small “bun mountain” at Hong Kong's Cheung Chau island in Hong Kong, China May 21, 2015, ahead of the upcoming Bun Festival on May 25. The festival celebrates the islanders' deliverance from famine many centuries ago and is meant to placate ghosts and restless spirits. (Photo by Tyrone Siu/Reuters)

13-metre-tall “Bun Mountains” wait to be set up under rains, at Hong Kong's Cheung Chau island, China May 17, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

Buns are stamped the Chinese characters “Ping An”, meaning peaceful and safe, inside a bakery, at Hong Kong's Cheung Chau island, China May 17, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

Competitors climb a 14-metre-tall tower, which will be used in the bun scrambling competition at the Climbing Carnival, at Hong Kong's Cheung Chau island, China May 17, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

Hundreds of buns are collected before being put onto a “Bun Mountain”, at Hong Kong's Cheung Chau island, China May 17, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

Workers tend to a 13-metre-tall “Bun Mountain”, at Hong Kong's Cheung Chau island, China May 17, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

A worker lifts up a small “Bun Mountain”, at Hong Kong's Cheung Chau island, China May 20, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

A giant effigy of a Chinese god is built at Hong Kong's Cheung Chau island, China May 17, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

Children play in front of “Bun Mountains” at Hong Kong's Cheung Chau island, China May 17, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

Children use contraptions to be attached to a float during a parade rehearsal at Hong Kong's Cheung Chau island, China May 17, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

Contraptions are prepared, attaching children to a float during a parade rehearsal at Hong Kong's Cheung Chau island, China May 17, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)

13-metre-tall “Bun Mountains” are seen during sunset at Hong Kong's Cheung Chau island, China May 21, 2015, ahead of the upcoming Bun Festival on May 25. (Photo by Tyrone Siu/Reuters)