What should I pay attention to when I travel to Dubai next week and eat in a seven-star hotel there?

If you stay in a hotel, there is no requirement. If you just go in for dinner, you don't need to wear shorts, although you will be reminded to wear close-fitting ones on the reservation form.

Shoes, actually nobody cares. The slippers here are China shoes, so you can wear them anywhere. Just pay attention to sunscreen and moisturizing recently. It's dry during the day and wet at night in summer. There's nothing special here. It is a good choice for girls to wear scarves, which can not only protect themselves from the sun, but also block the wind and sand when it is windy.