When the ducks appear, thousands of people in Trieu Khuc village become excited because the ducks are the main characters in a traditional contest namely "throwing pomelos, catching ducks". The contest is held at the village's main pond every August 12-13 of the lunar calendar - the sainthood day of Bo Cai Dai Vuong Phung Hung. This unique custom attracts many people every year, especially the young men who are good swimmers in the village./.