An Oxford engineering student was surprised but undaunted when he was approached to deliver a series of lectures in Beijing on global economics.
Matthew Richardson knew "next to nothing" about the subject but, believing he would be addressing a sixth-form audience, he felt he could "carry it off".
Mr Richardson, 23, borrowed an A-level textbook entitled An Introduction to Global Financial Markets from a library and swotted up on its contents on the flight from London to China.
From it he prepared a two-hour presentation, believing he had to deliver the same lecture several times over to different groups of students over three days.
Mr Richardson, who has the same name as a New York University professor who is a leading authority on international financial markets, was met at the airport and taken straight to a conference centre where, over lunch, "the horrible truth became apparent".
He said: "It became clear to me that my audience was not students, but people from the world of commerce studying for a PhD in business studies having already gained an MBA.
"And instead of repeating the same lecture, I was required to deliver a series of different lectures to the same people over three days. The first one was immediately after lunch.
"I have no idea who they were expecting. Being Chinese, they were inscrutable and if they were expecting someone else they didn't show it. Perhaps they thought I was a prodigy. They all called me professor.
"I had come this far, so I decided not to back out. I hoped I could blag my way through."