in a five-star hotel.

Tang Mochen walked up and down the hotel, apparently having something in mind.

"Why is it so difficult for you to make a phone call?"

"Don't worry, please listen to my explanation."

"I went to Miss Li's house yesterday, and their family went on a tour. They only got in touch with her yesterday afternoon."

"But she said that the way her parents communicate with their students is in the computer, not on her mobile phone."

"She has to go back to school to check the computer to know the phone number of winter parents."

"I know she can't get back in time, so I contacted...