ALBAWABA - China threatened retaliation if Taiwan’s president Tsai Ing-wen met the U.S. House speaker during brief stopovers in the United States. News reports said China also urged the United States against allowing the Tsai to transit through the country, saying that would be "provocation," which will be met with Beijing undertaking "measures to resolutely fight back." China warned the US and Taiwan President Tsai Ing-wen that any meeting between ...