The Hui people are one of the ethnic minorities in China and they believe in Islam. According to Islamic teachings, pigs are considered an unclean animal, so the Hui people do not eat pork and avoid contact with pig-related items.

Islam's definition of uncleanness is relatively broad, and pigs are classified as "halam", which are things that are explicitly prohibited from touching, eating and using by the teachings. Therefore, Hui people will try their best to avoid seeing or coming into contact with pig patterns or symbols in their daily lives. This is a religious practice based on reverence and belief in the teachings.

It should be noted that different Hui individuals may have different degrees of compliance with this custom. Some Hui may adhere to this rule more strictly, while others may be more flexible. Because of this, Hui Muslims’ inability to see the pig pattern is not a characteristic shared by all Hui people, but a factor that affects their individual living habits.