China says it's not responsible for North Korea — at least, not entirely.
North Korea has ramped up its nuclear weapons program in recent months. The U.S., Japan and South Korea have called on China to rein its ally in.
But on Tuesday, China's foreign ministry denounced what it calls the "China responsibility theory." It wants all parties to step up and share some of the burden.
China is North Korea's main trading partner and ally. China worries cutting North Korea off could lead to an immigration crisis and various other problems.
China has also blamed the U.S. and South Korea for rising tensions on the Korean Peninsula.
The U.S. also recently tested its anti-missile defense system, but that was planned before North Korea did its ICBM test.