The snow had cleaned the air but also caused severe traffic jam. The weather forecast says that another round of snow and temperature drop is on the way. North Shaanxi and central Shaanxi will have moderate snow and south Shaanxi will have moderate to heavy snow.
And because of the sharp temperature drop, the road will be frozen which will cause heavy traffic jam. So it will also be very crowded during the morning and evening peak hours for the public transportation, be careful if you are taking metro or bus.