not serious. According to the relevant information, as of September 7th, 2122, there were no new cases in Yan 'an for four consecutive days, the epidemic situation has been well controlled and not serious, and all administrative areas have been divided into low-risk areas, so anyone can go to other places, but when traveling, he still needs to prepare travel materials and note related matters according to the epidemic prevention policy of the destination, and take personal protective measures during the journey, so as to avoid going to crowded public places.