In my observations over the years I have seen the same thing. The Chinese are sharp dealers and buyer beware! Just musing but perhaps it has something to do with them being Communist for so long. No religion in the main and no sense of “fair play.” In my outlook and in a lot of western people’s minds the golden rule is real and if you don’t deal squarely with people then you have no honor and are not a “good” person. I’m sure this doesn’t apply to all Chinese people but it sure seems to be a factor that comes into play.
Cheers