In Chinese superstition, placing chopsticks upright in a bowl of rice resembles funeral incense and is therefore considered unlucky.
The resemblance is visual: two upright sticks rising from a bowl can recall incense offered to the dead. For that reason, diners commonly place chopsticks horizontally across the bowl or on a chopstick rest instead. The custom is particularly relevant at the dining table, where upright chopsticks can appear disrespectful or ominous.
This is one of several etiquette rules associated with chopsticks in Chinese-speaking cultures. Passing food from chopsticks to chopsticks is also avoided because it resembles the transfer of cremated bones during a funeral ceremony in Japan and can carry similar associations elsewhere.
The exact etiquette varies by country, family, and setting. The practice is best understood as a symbolic taboo, not a claim that the arrangement causes death. Chopsticks themselves have a history of more than two millennia in East Asia and remain central to everyday meals.