China's ambassador to the WTO Li Chenggang was speaking at a WTO meeting on trade disputes where he also said that Washington had informed it of its intention to appeal a recent WTO ruling which found that U.S. metal tariffs breached global rules.

"These troubling behaviours of the U.S. have clearly depicted an image of the U.S. as a unilateral bully, a rule breaker, and a supply chain disruptor," he said, according to a copy of his speech obtained by Reuters.

(Reporting by Emma Farge, editing by Rachel More)