Do people travel just because they got rich enough to afford a trip? “The world is so big, and I want to look at it,” says  a middle school teacher from Central China’s Henan Province, in her letter of resignation in 2015.  “A person has to be impulsive twice in their life: to fall head over heals in love and to go on a trip without any hesitation,”said another popular online post in 2016. So do we really need a good reason to travel? For ancient Chinese scholars, they did need a good reason to travel. But the most famous ventures in ancient China happened in the dreams of China's great poet and a young lady in a classic drama.