Possible North Korea Refugee Camp in China?

My name is Daniel. I was an English teacher in Seoul, South Korea, and am now a writer who has
published three books including South Korea: Our Story by Daniel Nardini.
                              It seems that relations with China and South Korea have been improving, 
relations between China and North Korea have been getting nasty. Strangely enough, in local
Chinese newspapers in Jilin province in the Korean Autonomous Zone in northeastern China,
there have been articles on what to do in case there is a nuclear war. The articles do not make
it clear if and how a nuclear would happen, and where it would occur (although it is believed
that it would take place in North Korea and could drift on to the Chinese side of the border
where Jilin province is). Just as equally strange is the mention of the local Jilin government setting
up “refugee” camps for those North Koreans who might be displaced in case of a nuclear war.
This part is perplexing since the North Korean refugees going into China now is due primarily because
of widespread hunger and deteriorating social conditions. First, it seems like a back-handed stab at
North area, and seems to show the Chinese are concerned that whatever happens to North Korea
will affect them. More to the point, why is China setting up camps to inter North Korea if something
should happen there? Just as disconcerting is that the Chinese have closed one bridge between 
Dandong, China, ans Sinuiju, North Korea. Also, the Chinese People’s Liberation Army’s 78th
Division, the one that mans the border between China and North Korea, has been staging
military exercises in “preparation” of some “change” along the border with North Korea. All
of this has to make you wonder if the Chinese government is concerned about a war against
North Korea, a possible collapse of North Korea, or a possible regime change in North
Korea.