The latest epidemic prevention policy for departure from Xi'an?

I think it is still necessary to call the relevant department, because there are changes every day. The day before yesterday, I listened to the nucleic acid within 48 hours.

Now you need to have a negative nucleic acid test report for 48 hours when you come to Xi’an, and you need to have a 48-hour nucleic acid test report when you leave Xi’an.

48-hour nucleic acid testing is provided for entry from other provinces, and an official letter from the unit is required for out-of-province travel