I wanna know more about Singapore before travelling

Your English appears good so you could easily pick a tour up in Singapore, more cheaply. Of course, you can only buy $500 in foreign currency from VietComBank.

Although small, Singapore is very clean, the traffic very ordered and safety is high. The government is far more authoritarian than VN.

Buying food from stalls in shared food centres is a great way to save money and yet experience a wide variety of cuisines. All public food stands and restaurants are strictly inspected and food standards are high.

The culture is a mix of Malay, Chinese, English and Indian which makes for very interesting experiences. The cost of living is way higher but you can find economy rooms in small hotels - the you can take the tour of hotel lobbies and see what a few hundred dollars a night buys you.

Sentosa is the entertainment district of the island nation, but there are some ancient, historic areas left.

Check: < dulich-singapore.com/singapore >. They can help you plan and provide brochures. Look for very cheap flights on Tiger Airlines  the government invested discount carrier.

You should write an account of your visit and impressions from a Vietnamese perspective.