I doubt it

Although a "united front" in dealing with the DPRK would be nice, I canot imagine a time where the South AND the US are sending aid while China pushes its brethren away. Politically, it just won't happen.
http://english.chosun.com/w21data/html/news/200506/200506030024.html
China Could Stop Food Aid if Pyongyang Tests Nuke
China has told North Korea it could suspend food aid if the impoverished country goes ahead with a nuclear test, Japan's Kyodo News reported Friday.
The agency quoted a U.S. government official and a source familiar with the situation in China as saying Beijing would consider suspending food aid, and North Korea "clearly knows China's position."

Chinese food aid makes up about 30-40 percent of North Korea's needs.
The officials said China also considered plans to suspend energy assistance, but in the case of the heavy oil it supplies to North Korea via pipelines, there is a danger that problems could develop should fuel supplies restart later, so this option was ruled out. Kyodo also said China apparently worried that cutting off fuel supplies would impact North Korea so severely that it could threaten the regime itself.

The news agency said many in the U.S. government believed Beijing's temporary suspension of heavy oil supplies in spring 2002 was a decisive reason behind North Korea's willingness to negotiate.