The email from the President of the International Society for Stem Cell Research lay in Yang Ping's inbox for three days before being answered.
It wasn't that Yang Ping deliberately delayed; he just didn't know how to respond. "If you have time, I'd like to come to China to discuss this face-to-face," said an old scientist who had been working in the stem cell field for nearly half a century, was nearly eighty, a Nobel Prize winner, a living fossil in global stem cell research, and wanted to fly across half the Earth to have a "face-to-face discussion" with you. This was no courtesy; this was serious.
Yang Ping replied with five words: "Welcome, you set the time."
The other party's reply came even faster: "Next Wednesday, I will come over with my two students. Please allow me to visit your laboratory and meet that volunteer."
Yang Ping forwarded this email to Manstein, who looked somewhat complex after reading it.
"Do you know him?"
