valid passport

 implement access to national borders. If a citizen of a country wishes to travel, settle, trade, study, etc. in other countries, in addition to having a valid passport or travel document, it is necessary to obtain a visa to the country. In general, a visa issued by a State to a foreigner is granted the same benefit and convenience to the citizens of the two countries on the basis of the principle of equality and reciprocity of foreign national treatment to their nationals. But there are visa-free countries such as holders of Chinese passport visa-free countries have 18, holders of US passport visa-free countries have 130 and so on.