```
In "The Big Bang Theory," Sheldon Cooper really likes trains.
Since he's a stickler for rules, he likes to do everything strictly according to schedule, including peeing, pooping, and even sleeping with Amy.
Moreover, he likes how clean and spacious trains are.
First thing's certain, he definitely hasn't ridden on a train in China.
The whole corps isn't like the Southwest Training Class with a Logistics Department; they couldn't possibly overstep logistics standards to pamper these elites by buying them plane tickets.
Having a sleeper berth was already a boon.
Old Zhang, who was leading the team, was sly as a fox. The day before, he had paid for a flight to Tianjin out of his own pocket and arranged for Counselor Sun from the War Training Department to accompany them.
Trains these days are really f*cking dirty.
Not just the train, the floor, the toilets, but some people's hearts are also somewhat dirty.