I wanted to also edit this in, but ran out of time:
Two years ago my wallet with about $6000 HKD in it (about ~$850 USD) and all my credit cards + ID fell out of my pants while I was dealing with a big package. An hour later in a panic I realized I lost it, but thankfully a HKer found it and returned it to the security guard at my building and all was good. Every dollar was still there. In the mainland my wallet of have been long gone.
lost my wallet plenty of times, always came back as did my phone.
lost it in switzerland, germany too, no find it... (not proud, but happens to me a lot)
i think it's more down to luck, you lose that in hk on the wrong corner, some guy will regard it as mr unknowns downpayment for a suit
once in shanghai i dropped 30k rmb through a whole in my jacket.
no wallet, just cash, old guy found it, ran after me like one block and slapped me, giving me a lecture to be more careful and handed it back.
fun fact if anyones interested in how much money they make, these stalls in good locations shenzhen, guangzhou, beijing, shanghai like the ones with just a kid sitting there will probably rent for 700-1500$ the sony one in his picture, with that size, in a market probably upwards of 6/7k$ they make plenty of money.
second thing i know, this isn't always the real deal, they may not be knock offs, but they sell zipin quite often.
which are broken products.
every factory produces a certain number of faulty products together with the good ones, this number is higher than you think.
each industry or brand has it's standard, say sony says maybe if the tv has 3, scratches and inside this circuit is bad than you don't deliver it.
the factory than has to destroy it because it's not allowed to sell it by law. also if they gift it they have to pay taxes for it.
so there is guys who "destroy" them and bring them to the markets.