China crackdown on North Koreans hiding in China intesifying

I asked why this is happening and was looking around for answers and came across some different articles.

What I am getting is:
China does not want large numbers of refugees in its North Eastern Provinces since it could destabilize the region against the Chinese Government. (that's odd because there are already large numbers of North Korean refugees in this area)
It wants to keep good relations with the North Korean Regime by sending them back.
Maybe Seoul and China have an under the table agreement about the refugees.

Anyway, there are a few articles here for reading and I've taken a few quotes out of some of them.

I especially like the first one here. the person in the Quora said something interesting about the United States being so friendly with Saudi Arabia but conveniently forgetting to mention Saudi Arabias human rights abuses. since United States doesn't want to be associated with a human rights abusive country, they tell the corporate media not to mention it.
Same thing with China I guess....

 

https://www.quora.com/Why-does-China-arrest-and-repatriate-refugees-from-North-Korea-and-send-them-to-Pyongyang-rather-than-to-Seoul 

http://www.dailynk.com/english/read.php?num=14755&cataId=nk00100

 https://theowp.org/china-cracking-down-on-north-korean-refugees/

https://www.pri.org/stories/2014-12-05/china-cracking-down-missionary-lifeline-helps-north-korean-refugees