What's the use of a passport?

Definition of Passport The passport of the People's Republic of China is a document issued by the China government to China citizens to prove their nationality and identity when they enter or leave the country, travel abroad or stay. 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. Passports are divided into diplomatic passports, official passports, ordinary passports and SAR passports. Ordinary passports are divided into ordinary passports for business and ordinary passports for personal reasons (hereinafter referred to as "personal passports"). SAR passports are divided into Hong Kong SAR passports and Macao SAR passports. Diplomatic passports, official passports and ordinary passports on business are collectively referred to as "passports on business". Validity of Passports Diplomatic passports, official passports and ordinary passports are valid for a maximum of five years and can be extended before their expiration. Passports of the Hong Kong Special Administrative Region are generally valid for 10 years, and passports issued to children under 16 years old are valid for 5 years. Generally, Macao SAR passports are valid for 10 years, and passports issued to children under 18 years old are valid for 5 years. The Role of Visa Visa is an important measure taken by a sovereign country to implement entry-exit management in order to safeguard its sovereignty, dignity, security and interests. Citizens of a country must have valid passports or travel documents if they want to travel, settle down, study abroad or perform official duties in other countries. Another necessary condition is to obtain visas to other countries. Otherwise, it is impossible to make a trip. Visa type 1. Visas are mainly divided into three categories: diplomatic visas, official visas and ordinary visas. 2. According to the entry and exit situation, it can be divided into exit visa, entry visa, entry visa and re-entry visa. For exit visas, only the holder is allowed to leave the country. If you need entry, you need an entry visa. Entry visa means that only the holder is allowed to enter the country. If you need to leave the country, you must apply for an exit visa again. The holder of an entry-exit visa may leave or re-enter the country. For multiple entry and exit visas, the holder may allow multiple entry and exit within the validity period of the visa. 3. According to the reasons for entry and exit, it is divided into immigrant visa, non-immigrant visa, study visa, tourist visa, work visa, business visa and family visa. 4. According to the length of time, it is divided into long-term visas and short-term visas. The concept of a long-term visa is to stay in the destination country for more than 3 months. It usually takes a long time to apply for a long-term visa, regardless of the purpose of the visit. A visa that stays in the destination country for no more than 3 months is called a short-term visa, and it takes a relatively short time to apply for a short-term visa. China citizens are exempt from entry and exit visas. The visas issued by Chinese visa authorities to foreign citizens include diplomatic visas, courtesy visas, official visas and ordinary visas. Ordinary visas are divided into eight categories, with eight Chinese pinyin letters (D, Z, X, F, L, G, C, J- 1, J-2) as codes. Contents of Visa Different countries have different formats and styles of visa contents, but the basic contents remain unchanged. It can also be said that the basic contents of visas in various countries include: visa type, visa code, purpose of entry and exit (transit), duration of stay, valid times, issuing institution, issuing place, signature and seal of visa officer, issuing date and visa fee. Some countries also attach photos of visa recipients (consistent with those in passports), and some also attach stamps and anti-counterfeiting marks. The period of validity and stay of a visa refers to the time from the date of issuance of the visa to the entry period. After this period, the visa is invalid. The duration of a visa refers to the time allowed for the holder to stay after entering the country. Individual countries stipulate that the validity period of visas is consistent with the duration of stay, but most countries have a visa validity period longer than the duration of stay. If a country issues a visa with a validity period of 3 months and a stay time of 15 days to the applicant, the holder of the visa can enter or leave the country on any day within 3 months from the date of issuance, but the holder can only stay in the country for 15 days at most from the date of entry to the date of exit. What needs special attention is that some countries stipulate that the holder must leave the country within the validity period of the visa after entering the country, regardless of whether the stay period has expired or not, otherwise it is illegal.