My thoughts are more in line with poconopenn's. Counterfeiters won't invest as much in technology, equipment or other resources as government mints. Or probably they would go bankrupt. So their products will be inferior one way or another. So far the fakes I have run into in modern Chinese coins, including circulating coins and precious metal coins, are readily detectable in high magnification photos. A collector with some basic knowledge of coin striking can detect this eBay listing as a fake because of its obvious weak strike:
https://www.ebay.com/itm/China-1980-5-Fen-coin-UNC/302699214021?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649. It is unlikely that the counterfeiter did not notice this problem, but this is the best he could achieve with his limited means, with the hope to fool some new hands.
I have yet to see the kind of legendary fakes feared by old Chinese coin collectors surfacing in modern Chinese coins. With this in mind, I would say that exposing the existing fakes with their characteristics will be helpful to new collectors.
