Dongmen and Mingdong are both good, but there are also many things that will be more expensive. If you really want to buy something, you'd better go to the duty-free shop at the airport. The price is cheaper than the outside, and it must be genuine ~ ~ The night view of Nanshan Tower is good, but it has nothing special, just like the Oriental Pearl ... Hony University and Ewha Naked are super fun places that Koreans often go to, with many distinctive shops and snacks.