The first page of passport refers to the personal information page plus the signature page. Usually, the first page of a passport contains key personal identification information and basic information of the passport. For example, the first page of a passport usually includes information such as name, nationality, gender, date of birth, date of issue and validity period of the passport. In addition, the first page of the passport also contains the passport number and the information of the issuing country. The first page of passport is not only the most important page in passport, but also the most easily recognized page. Because all other pages must be stamped or signed on the first page of the passport to prove their legitimacy. Therefore, the first page of a passport, also known as the "home page" or "cover", is usually regarded as the "proof of identity" of a passport. Passport is a legal document issued by a country to prove the nationality and identity of its citizens when they enter and leave the country and travel or stay abroad. The word passport means port pass in English.