North Korea's latest nuclear test is likely to pile more pressure on China to take tough action against its neighbor, but Beijing already doubts economic sanctions will work and says it is not its sole responsibility to rein in Pyongyang.
China has lambasted the West and its allies in recent weeks for promoting the "China responsibility theory" for North Korea, and has been upset by Seoul and Washington's own military drills that Beijing says have done nothing to cool tensions.
"The United States has to play its own role and should not be blindly putting pressure on China to try and squeeze North Korea," said Ruan Zongze, a former Chinese diplomat now with the China Institute of International Studies, a think tank affiliated with the Foreign Ministry.
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