In the ten months of travel I recently completed there was only one place which I would skip in hindsight. There are hundreds of extra places and different places I would go, including Myanmar, but Huangshan was the only place that was an ill informed choice for our budget and time constraint.
Our general time constraint was quite liberal but more specifically we needed to get to Hong Kong due to having a dual entry Chinese visa and the first half nearly being used up. We had intended to stay five days in Huangshan, or Tunxi as the actual area was called and in this time we ended up doing very little. One thing to be aware of is that the only train to Shenzen comes from Shanghai and so is a very busy route in which you are unlikely to be able to get a bed as they prioritise people doing the entire route and only open the leftover a couple of days before, if there are any. In a town with no English spoken we managed to get around the ‘No’ situation at the train station by getting a quieter train to Guangzhou which then has regular bullets to Shenzen. After doing a few hard seat journeys already I didn’t fancy one for 20 hours.