> If I remember correctly, this used to happen on historical maps too, the UK and Europe were often made larger than they actually are.

A consequence of the projection chosen, applied uniformly (e.g. Mercator, which also makes Greenland and Alaska ludicrously large)? Or do you mean maps that enlarged Europe specifically? Mercator is dumb (for anything other than navigation), but there is a significant difference here. China is doing the latter.