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"Don't know where he comes from," Trump said in the Oval Office, dismissing the photos.

"During a time of record demand for aluminum in the United States, it is critical that companies have access to a steady source of supply. That's why we continue to call for quota-free tariff exemptions for countries like Canada that play by the rules and operate as market economies," Matt Meenan, spokesman for The Aluminum Association, wrote in an email.

"Enterprises' mid to long-term loans have also seen a notable increase. Such loans are mainly used for expansion of business activity, instead of flowing into financial markets," Liu said.

"Due to the decentralization of the blockchain, its applications are gradually broadening. Systems exposed in the public chains cannot be shut down, and bugs are extremely difficult to fix," Yu said. "As blockchain is evolving into a technical infrastructure service, serious security problems would occur once something goes wrong with it."

"Driven by the pandemic and uncertainties in the market, risk-hedging demand may continue to support the gold investment market," he added.