Why is the Chongqing subway so deep?

Okay, so you ever wonder why the Chongqing subway feels like you're descending into the earth's core? Seriously, it's deep. I mean, deep. Like, I once took the Line 3 and felt like I was going down for ages. I started to wonder if we were accidentally going to hit the center of the earth or something!

The reason? Well, Chongqing... it's not exactly known for its flat, easy-to-build-on landscape, is it? Nope. It's all mountains and hills. Think about it - try building a subway line across a mountain. It'd be a nightmare, right? A complete and utter logistical headache. So instead, they just...go under the mountains. Clever, huh?

Apparently, building those deep stations means they avoid a whole lot of hassle on the surface. Less disruption, less time spent dealing with, you know, actual mountains. Plus, it makes the train journeys smoother. No jerky stops and starts because of the uneven terrain, which I really appreciate after a long day. I remember being on the bus up there – that thing was shaking like crazy!

So yeah, the deep Chongqing subway? It's all about practicality and navigating that crazy, beautiful, hilly terrain. They had to dig deep – literally! – to make it work, but hey, at least the ride’s mostly smooth, even if my ears pop a little sometimes.