Trading with China is an interesting situation. China is often the supplier of steel for many major American construction projects, although the steel is considered sub-par by many. However, it is very difficult to sell to China. Additionally, an issue with returning to a market years later is the market will have changed in the years since you exited. For example, if you exit a market like one established in China and decide to go back with the same or similar product, you now have a culture and economy that is very different now. Maybe there is more competition in the market now and your product may not be viewed the same. In addition, setting up a new distribution channel could be a big challenge. The world changes over time and what works in one area at one time may be completely different just years later.