Window dressing from the PRC.
I don't think so. China has better reasons than any other country to want to see the Norks reform their economy. The Chinese are afraid of losing influence over North Korea through an internal coup (to either the Americans or to the South Koreans - same difference), or that North Korea will simply collapse and China will be overrun by millions of Koreans. It is kind of funny to think of the Chinese fearing a flood of immigrants given that all of China's other neighbors are afraid of China for the exact same reason.