As a frequent SeekingAlpha reader/commenter, I notice good news and bad news on China. They're noises. Just ignore them as in other media. The fact is China is growing and moving up the product value ladder. It will not move as fast as 20 or so years ago. It is a norm when a developing country is moving to a developed one.
For the next 10 years, China should
improve its citizens' living standard by providing clean water, fresh
air, more social justice, more freedom and less corruption (doing that
quite well now).
We have seen many countries doing that (even the
US from the colonial days to WW2). However, we have not seen it in such
a grand scale that affects the entire global economy.