[CROSSHIGHWAYMAN]

And I've heard reports of Chinese troop build-up along the border with North Korea.

Without South Korea, Japan and America as trading(dumping grounds) partners, China would collapse in a heartbeat.

China has been warned to take care of the problem soon!
Just watch.

[Pubbie]

"And I've heard reports of Chinese troop build-up along the border with North Korea."

The Chinese have put (According to Hong Kong Newspapers) 150,000 troops on China/Korean border.

They say this is just to prevent illegal immigration into Manchuria.

The troops on their border (Apparently) have no heavy weapons, but if they DO start putting heavy mechanized forces on the border then that would signal they are going to attack North Korea. (However there is no sign they are going to that - yet).