Ask for leave.

The unit temporarily asked me to go on a business trip to Ningxia for three days. I was busy and I don't think I can update it.

Although I have a notebook with me, I can run around Yinchuan during the day and have no chance to type. Go back to the hotel in the evening and try to write it. I don't think there will be much to write it; if you can't write it out, please forgive me...