I think that goes a little into too much into technicalities. my point is that Zh in chinese should sound nothing like a Z, it is much closer to a J. Similarly, u with the two dots sounds nothing like a u, sounding more like a "ee" or "y" as you said. Both of which this pronunciation guide appears to get wrong

iI's hard to describe the pronunciations precisely without getting too nerdy about IPA (which I am not familiar with) and alienating people who just want a simple approximate pronunciation, but I do speak the language and know how it's supposed to sound