[dragnet2]

China is massing troops at its border with DPRK, not to support them, but rather to stem the flow of refugees and to seal the border when hostilities commence.

Could I see a link to this?

[RobertClark]

http://www.foxnews.com/politics/2013/04/01/china-mobilizing-troops-jets-near-n-korean-border/

A Bing search will turn up thousands of reports from world media. If utilizing the search terms "chinese military massing on Korean border". It creates a situation where you kind of need to choose your interpretation and base that from what source you choose to believe.