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As a driving force for the global economy, the G20 should adhere to open development, support the multilateral trade system with the World Trade Organization at the core and prompt trade and investment to continue playing the role as an engine for the world economic growth, Xi said.

As a more encouraging sign, China's exports jumped 21.1 percent year on year in November in US dollar terms, the fastest growth since February 2018, thanks to strong demand for medical goods and electronics.

As far as foreign policy is concerned, Ye said, Bolton is also notorious, although he was calling the current US government "naive" and "ignorant" in dealing with foreign affairs.

As for Hua's plans, the man who co-founded a company in Yunnan making truffle products last year aims to take high quality Chinese truffle to the world.

As a low-interest-rate environment compelled investors to make riskier investments, the share of debt owed by firms with weak debt repayment capacity has risen to a "sizable" level in several major economies, and could reach post-global financial crisis levels in the event of a material economic downturn, the IMF said.