Unlike the last time going to Australia, this trip to Philadelphia is quite pleasant for Qiao Yu.
Mainly because more than ninety percent of the journey was spent in business class on a wide-body aircraft. Except for being a bit expensive, everything else is an advantage.
On the plane, not only could you stretch out, but you could also turn around freely. If bored, you could watch a movie. The only pity is that there is no direct flight from Beijing to Philadelphia, so a transfer in Chicago is needed.
Of course, adding the transfer fee makes it even more expensive.
But the cost is something Qiao Yu doesn't have to worry about. After all, he didn't buy the tickets. This is quite reasonable, considering his academic entourage also sits in business class.
According to the rules of the International Mathematicians Conference, academic entourage is usually the students or assistants of the invited big shots.
