During the Hungry Ghost Festival,which starts 7th month of the lunar calendar lasting for a month, many Taoist temples have prayers,offerings and singing operas held at their premise. The opera will go on even though no audience as it is to entertain the wandering spirits.
Food offerings such as ‘ang ku kueh’ are some of the usual offerings. If you see Joss sticks burning and food offerings on roadsides, it’s meant for the wandering spirits.