UPDATE 1 — China's Sinograin restarts large soybean sales ahead of Trump — Xi summit
(Recasts, adds details; paragraphs 1-6) BEIJING, Sept 18 (Reuters) — China's state stockpiler, Sinograin, has resumed large-scale auctions of imported soybeans after a pause of roughly a month, ahead of an expected summit of US President Donald Trump and Chinese leader Xi Jinping in Washington next week. The auction, s