Europe, Switzerland.
Inside a laboratory in the scientific research building at the Swiss Federal Institute of Technology in Zurich.
Professor Yang Kaining is leading his doctoral students in a biological experiment. These doctoral students are among the best ones under his supervision.
"Hey, Professor Yang."
A foreigner at the laboratory's door called out to Professor Yang Kaining.
"William?"
"Professor Yang, do you have a visitor today?" asked William.
"A visitor?" Professor Yang Kaining thought for a moment, then recalled the matter and nodded, "Ah yes, there is! Is it a visitor from Xia Country?"
"Yes."
"Understood, thank you, William." Having said that, Professor Yang Kaining turned to his students and said, "Carry on as before, go over the contents of this study again."
"Okay, Professor Yang." The students nodded in agreement.
