A South Korean official at the Korea Meteorological Administration watches television news channels showing North Korean leader Kim Jong-un on Sunday. The tremor from Pyongyang’s sixth nuclear test was five to six times more powerful than that of the fifth test, the agency said. Photo: AFP

China and Russia unite against North Korean nuclear test

China’s nuclear safety agency starts monitoring radiation levels along its northeastern border

Topic |   North Korea nuclear crisis

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A South Korean official at the Korea Meteorological Administration watches television news channels showing North Korean leader Kim Jong-un on Sunday. The tremor from Pyongyang’s sixth nuclear test was five to six times more powerful than that of the fifth test, the agency said. Photo: AFP
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Catherine Wong

Catherine Wong

Catherine Wong is a reporter with the South China Morning Post in Beijing, where she focuses on China’s diplomacy and defence policy.

Liu Zhen

Liu Zhen

Liu Zhen joined the Post in 2015 as a reporter on the China desk. She previously worked with Reuters in Beijing.