I really suggest reading Michael Pettis, mpettis.com. His last post on the 19th actually talks about consequence for China of the Euro crises.

To summarize.

1) Global trade has to balance out. Trade deficit equals buget deficit. Less consumption in Euro deficit countries (Greece, Spanish, Portugal etc) needs to be balanced out by less export by exporting countries or the excess export needs to be absorved by someone else.

2) The biggest exporter and importer are China and U.S. While China is attempting to re-balance its economy (from export dependent to more internal consumption), it still relies too heavily on exports. Euro import contraction will put additional pressure on China to adjust faster than it wants.

3) U.S. needs/wants to adjust by importing/consuming less and producing more. One way for that is currency devaluation. (As an aside w/o devaluation economies can expect massive unemployment in the 20% range) It does not want to take up additional import.

4) Rest of the world already angry at China for increasing market share of global export at time of expansion. The added tension with U.S will likely lead to trade war in the next few years.