I need to learn what?

票, a paper ticket, beats rock (gold nugget). I thought everyone knew that?

运钞车 = The small armored vehicles that move currency in bulk to and from the many banks on China's city streets.

In Hong Kong, such vehicles are usually called 解款車. 解款 = 解送現款 = delivery of cash under guard.

In ancient China, 元宝 are gold or silver ingots used as currency. Nowadays, we refer to cash as 现金. So after I've had a chance to remember all of that, the use of the gold radical is satisfyingly appropriate.

Ah, all very interesting.

And it seems that 解, when it means to transport under guard, is pronounced as jiè​, not jiě.

票, a paper ticket, beats rock (gold nugget). I thought everyone knew that?

Hahaha, took me a moment to get it. I bet that's a good mnenomic for it too

In Hong Kong, such vehicles are usually called 解款車. 解款 = 解送現款 = delivery of cash under guard.

That would make more sense. The vehicles in Kunming are accompanied by a couple guys with short-stocked 12 g. pump shotguns.