Don't appear pushy or offer too much money: Vietnamese people usually don't like to be rushed. Drink plenty of bottled water: Especially in summer, you should drink at least 2 liters of water per day. If you drink tea, coffee, and alcohol, you need to drink more water because they can dehydrate you.

Keep your cash, credit cards, airline tickets, and other valuables in a safe place: Most 4-star hotels have in-room safes; if not, ask the reception to keep your valuables in their safe.

Take a hotel business card from the reception desk before leaving the hotel. This will make it easier for you to return to the hotel by taxi or cyclo.

Most tourists visiting Vietnam require a visa for entry. Citizens of countries that have signed bilateral or unilateral visa exemption agreements with Vietnam are exempt from visas; tourist visas can be valid for 15 to 30 days.

Hanoi and the northern part of Vietnam experience four distinct seasons: spring, summer, autumn, and winter. The mainly dry winter lasts from November to April, with average temperatures ranging from 18-20°C. The hot and humid summer extends from May to October, with average temperatures around 30°C.