1. Get your passport and visa, and be aware of the visa’s duration and conditions, and do not exceed them. (It’s just a tourist visa. It would be better if there is a certificate of employment issued by the company, proving that the company helped you retain your position while you were out for fun, as well as your monthly income, etc.)
2. After confirming the ticket, it is best to have a backup. You can print it or save it on your mobile phone.
3. Decide on the itinerary and see if your friend can take you the whole way, or if you still need to walk in some places by yourself. If you need to go by yourself, you need to do more homework. Hotels, transportation routes, etc. must be prepared in advance.
4. If there is no staff on the plane to hand you the immigration card, you can add it when you enter the Malaysian customs. There is a Chinese template on the table to fill in, so it is not very troublesome.
5. Don’t take too much trouble with what you bring. Don’t bring food, just bring some simple clothes. It’s hot, so short-sleeves are the best. If you are considering going to Genting, you can bring a set of long clothes. It's colder up there.
6. If you have a connecting flight, remember to check in your luggage for the entire flight at the first stop, so that you don’t have to look for your luggage and check it in again.
7. Remember to bring some cash (about RMB 5,000 is enough). UnionPay is not popular in Malaysia. If possible, it is more convenient to bring a VISA.