The decision by China, North Korea's biggest ally and economic supporter, to approve the U.N. resolution after drawn-out discussions at the U.N. may reflect some frustration on Beijing's part toward its neighbor.
"China has limited influence with North Korea," Zhang Liangui, a researcher with the ruling Communist Party's main research and training institute, said in Beijing. "Beijing disapproves of any nuclear test or new missile launch, but there's not a lot it can do."
Peter James Spielmann reported from the United Nations. Associated Press writers Hyung-jin Kim in Seoul and Christopher Bodeen in Beijing contributed to this report.
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