They mangage/manipulate their currency so that there is effectively a huge discount to all products and services in China.
That's a myth as pointed out in my summary. Back in early 1990's the official rate was something like 1 USD to 3 RMB but the black market rate was 1:8. Nobody would bring their USDs to the bank to get Yuan; instead they all found black market source to get more Yuan. Eventually, the Chinese government realized they couldn't pop up the Yuan and so let it fall to the black market rate. Currently, the black market rate is the same as the official rate. If it is really undervalued, I would think the black market would reflect that. In China, always look at the black market first.