* US, Chinese officials to meet on sidelines of ASEAN summit in Kuala Lumpur * Chinese rare earth restrictions, US export control blacklist are key flashpoints * Chinese officials aim to keep Trump-Xi meeting from derailing By Xinghui Kok KUALA LUMPUR, Oct 25 (Reuters) – Top economic officials from the U.S. and China will face off in Kuala Lumpur on Saturday to try to avert an escalation of their trade war and ensure that a meeting happens next week between U.S. President Donald Trump and Chinese President Xi Jinping. The talks on the sidelines of the Association of Southeast Asian Nations summit will seek to find a way forward after Trump threatened new 100% tariffs on Chinese goods and other trade curbs starting on November 1, in retaliation for China's vastly expanded export controls on

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