What cultural faux pas should I try to avoid making in Da Nang?

"It is important to be mindful of cultural norms when visiting Da Nang. It is considered rude to point with your finger, so it is best to gesture with your whole hand. It is also important to dress modestly, as shorts and tank tops are considered inappropriate. Additionally, it is important to be respectful of religious sites and to avoid taking photos without permission. Finally, it is important to be aware of the local customs and to avoid making assumptions about the culture," said another expat in Da Nang, Vietnam.