Chinese representative Wu Dawei made the comments during meetings in Beijing with his Seoul counterpart Lim Sung-nam, according to an official at Seoul’s foreign ministry.

The official, speaking under condition of anonymity, said to Yonhap News: "During the talks, Wu made it clear that China will not accept North Korea as a nuclear-armed state.”

China’s stance is now in alignment with that of the United States.

“The United States will not accept the DPRK [North Korea] as a nuclear state,” U.S. Sec. of State John Kerry said to reporters in Seoul. 

Yonhap also said that media reports about China agreeing to enforce U.N. sanctions against North Korea were confirmed by the same official.