The first question
I won't answer you, because today is the 27th. It is estimated that you will be on the plane by this time. Even if the clothes are not enough or it is not suitable to get off the plane, you can take the airport bus and get off at the central square, where there are many shopping malls where you can buy two clothes. Brand clothes may be a little more expensive than those in the mainland, because there are often various discounts, unlike most brands in the north.
the second question
On the first day, for healthy people aged 20 to 40, the problem of altitude sickness was not obvious at all. Maybe I will feel a little dizzy for a while, but for those who just left, the air is dry, so it is better to drink more water and let the hotel get a humidifier to send it to the room.
Third question
The necessity is generally estimated to be money.
The fourth question
Specialty is actually beef jerky, horn comb or various Tibetan ornaments. But now it is basically available in other places. Moreover, most local specialty sellers are southerners, and even suppliers are in the south. The original flavor can be met but not sought. You'd better not buy those agates and colored stone bracelets in small shops, they will fade. If you are led by relatives, it will fade after a while, which is very embarrassing. If you buy it, you can go to Baoguang Gold Store, which has many chain stores like Chow Tai Fook. It is a more formal place to sell local jewelry in Xining. It's not very expensive.
The fifth question
There are snacks in several places in the evening. I don't know where the hotel you booked is. It's probably not too far from the central square. It doesn't matter even if it's far away. It's very cheap to take a taxi in Xining. Since 6 yuan, it's usually about 10 yuan to eat snacks or go shopping in the city.
Eat snacks in Shuijing Lane near the central square. There are also snacks and some specialties. Or take a taxi to Koufu Street, Mojia Street is a famous place to eat snacks. It's about ten yuan to take a taxi from the central square.
The sixth question
I think some friends say there are no problems that need attention, and I think there are quite a few problems that need attention. As we all know, many ethnic minorities in Qinghai, as well as many restaurants and snack bars, are run by Hui people. When you go, you must respect other people's national beliefs, don't say things you shouldn't say, and don't take things that are taboo. Maybe you didn't mean to, but it's not good to offend other people's religion. You'd better know the specific taboos. I can't talk nonsense here.
Let me ask you a question.
You can go to Ta 'er Temple or Qinghai Lake when you are free on business trip. These two places are representatives of culture and different landscapes. It's a pity not to go there all the way to Qinghai. Ta 'er Temple is not far from the city. There is a special bus to go there. Even taking a taxi to the airport will only cost you money. If there are no peers, it is also a good choice to sign up for a one-day tour. At least you don't have to bother to check so many things and routes yourself.
The temperature difference between morning and evening is a little big. I'm afraid you can't carry it. It's a good choice to bring an extra dress in your bag.