Yes, but at the same time it is a-typical in its approach to many concepts, apparently including national parks. And even there, given the size of the country there is a very large chance that OP's sample size is small even within China alone.
They could have just as well been more specific and simply said 'China' or name the specific parks rather than to write 'east Asia'.
My main point was just that he was not "extrapolating to a whole continent". Which is a nitpick, however, it also makes your nitpick more nitckpicky due to his generalization becoming far less general.