Agree. Also, the reason China exports so much is that encouraging export manufacturing is the most efficient way Beijing has to increase the economic prospects

Agree. Also, the reason China exports so much is that encouraging export manufacturing is the most efficient way Beijing has to increase the economic prospects of the average young Chinese man. They care about that because if the prospects of the average Chinese young man stagnates, Beijing runs a serious risk of losing control of the country through riots and various revolutionary social movements as has happened many times in Chinese history. In summary, it is a weakness in Chinese society (along with the fact that Washington has been co-operative at least until recently) that is the underlying cause of why China exports so much.