This also made Lott Degen eager to see how Qiao Yu articulated his ideas. So his hand was already on the keyboard, planning to reply to Qiao Yu and affirm his thoughts.
However, just as he typed "Dear," Lott Degen suddenly noticed that this email was sent about forty minutes ago.
Coincidentally, Beijing time is exactly twelve hours ahead of Princeton, so you don't even need to calculate carefully to realize it's only half past eight in the evening in Huaxia...
Obviously, for a student, this is not an inappropriate or impolite time to make a call. So, Lott Degen simply picked up the phone on his desk and directly dialed Qiao Yu.
Compared to email, apparently, a phone call is more convenient and is a better way to pass the wisdom of the elder to the next generation of mathematicians.
The call connected quickly, in less than three seconds, Lott Degen heard Qiao Yu's enthusiastic voice.
"Hello, who is this?"
