The air quality in Lanzhou is not so good ~ you have only been here for a year, and the impact of bad air can not be felt in a day or two. It is estimated that you have some symptoms of rhinitis, drink more water and eat more fruits. If the weather is bad, I suggest you wear a mask ~ but I still suggest you go to see a doctor ~ let the doctor prescribe some medicine for you ~ a little rhinitis is estimated to be fine.