Around 20 Chinese scholars were "recently" denied entry by US Customs and Border Protection despite holding valid visas, according to a foreign ministry statement. BEIJING: China advised its citizens on Thursday (Apr 16) to use caution when travelling to the United States and avoid entry at Seattle's main airport following "malicious" border checks. Around 20 Chinese scholars planning to attend academic conferences were "recently" denied entry by US Customs and Border Protection (CBP) at