Edward Witten kept looking towards the door, his face almost spelling out 'why' in big letters. He had no idea how one could be discussing research so seriously one moment and then suddenly switch gears like that...
And then, he left?
He sat there stunned for quite some time before he turned to Zhou Li and asked, "Why did he leave?"
"Didn't he say?" Zhou Li was also slightly off-guard but after checking the time, he understood. "He's gone on a date."
"Xiaoqing? A date? With a woman?"
"What else?"
"...But we were discussing important issues, the most important mathematics and M Theory issues."
"So what?"
"Don't you get it?" Edward was incredulous. "M Theory, or rather, mathematical research is the most important thing. We're making rapid progress here! Significant progress!"
"I know." Zhou Li nodded in understanding.
"What do you know?"
"I..."