Hwy 8 passing through Taroko is a narrow, winding mountain road. In many places two cars can barely pass each other without using pull-outs. Driving on it is pleasant though, as long as the traffic is within reason. If however, there are convoys of buses approaching from both sides, it inevitably leads to congestion. Further, if said buses happen to meet in one of the bottlenecks, which are numerous, one (and everyone behind it) will have to drive in reverse to let the other pass – that is assuming there is no disagreement as to who should backtrack.
This is on top of all the usual issues with tour groups, and not only a problem in Taroko of course but in other popular places as well.
So it’s not as much about the Chinese as such, as it is about tour groups being driven there by the busloads, although with the dwindling number of tourists, things might have got better since the last time I went there. Perhaps someone could update us.