What does it mean that the passport has DT?

DT is the abbreviation of Delay Trip in passport book, which means "travel delay" For example, if you fly to Indonesia via Hong Kong and cannot fly to Indonesia after arriving in Hong Kong for some reason, then you will be marked "DT" on your passport by border inspectors. This is also an abnormal way of going to Hong Kong. A passport can only be DT twice at most, and the third time will be blacklisted by the Hong Kong Immigration Bureau (visa+computer list cannot go to Hong Kong), but the bad records of the first two times will be cleared with the replacement of a new passport. DT is only written on the passport with a pen, and will not be recorded in the computer.

Extension: Passport Passport is a legal document issued by a country to prove the nationality and identity of its citizens when they enter and leave its territory and travel or stay abroad. The word Passport means port pass in English. In other words, a passport is a passport for citizens to pass through international ports in various countries. Therefore, some countries in the world usually issue passes instead of passports.