The rumor cited the May issue of Hong Kong monthly news outlet Dong Xiang. It said a Chinese Ministry of Foreign Affairs junior minister invited Park Myung-ho, an official of North Korea, for a meeting. China's Foreign Minister Wang Yi attended the meeting and asked his junior to read aloud the warning to the North over the nuclear test. The memorandum mentioned that China will condemn strongly, pull back on all economic cooperation and even blockade North Korea if it conducted the test.

It didn't take Korea long to respond...

In an almost unprecedented criticism of China on Wednesday, North Korea's state media said Chinese state media commentaries calling for tougher sanctions over Pyongyang's nuclear program were undermining relations with Beijing and worsening tensions.