"This professor must have an inner program embedded in his brain, with a system update running incessantly," this is what I think of Prof Winston.

Earlier this year, I flew from Hong Kong to Cambridge, and, of course, visited Prof Winston. And, another of course, he was practicing another system update on himself.

"You know, my wife says that I don't smile much. Do you think so? Ok, I am going to smile more."

That was a really cute smile. It is hard to describe, just like a baby wobbling to walk. Really cute. But what I see through his smile is his kindness to students and never-stopped learning.

Our conversation was about my future research path, and Prof Winston recommended lots of professors and constructive suggestions. It was my most memorable conversation with him, not only because his advice was very helpful for a new graduate, but also because in this conversation I saw so many cute smiles.

At the end of our conversation, I looked at my whole page of notes and showed my gratitude to Prof Winston. He gave me a big hug and asked,

"So, how was my smile?"