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"Congressional subpoenas for the President's personal information implicate weighty concerns regarding the separation of powers," Roberts wrote. "Neither side, however, identifies an approach that accounts for these concerns."

"China seeks balanced trade with other countries, rather than a trade surplus," Wei said. "The expo shows China's commitment to facilitating mutual benefit and a win-win partnership with other countries and regions."

"Contacts between the cultures of East and West really began in Macao," said Nicholas Platt, a former US ambassador, who spoke at the event.

"Chinese companies have become very active investors in US startups in recent years," Xiang said. "Meanwhile, China's tech products and services, such as Huawei's smartphones, are of good quality. It is different from trade behavior such as dumping uncompetitive products. Such restrictions lessen consumers' choices when purchasing goods."

"China should further streamline VAT brackets to encourage fair market competition, which in a sense reduces taxes for many enterprises," Liu said.