What are the procedures to go through when traveling abroad?

Any country implements strict inspection procedures for incoming and outgoing passengers. The departments that handle these procedures are generally located at the entry and exit points of passengers, such as airports, stations, terminals, etc. Entry and exit procedures include: ①Border inspection. In many countries, the immigration bureau is responsible for filling in entry and exit registration cards (sometimes on the plane), submitting passports for inspection, checking visas, etc. Some countries waive transit visas and allow travelers to leave the airport and visit the city. They just leave their passports at the border to collect transit cards and exchange them when they return. ②Customs inspection. Generally, they only ask if there are any items that need to be declared, or fill in the entry and exit declaration form for the items carried by passengers. Customs has the right to open the box and inspect the items when necessary. Diplomatic passport holders are generally exempt from inspection. Countries have different management regulations on entry and exit items. Generally, items such as cigarettes and alcohol are released according to quotas. Cultural relics, weapons, local currency, drugs, animals and plants, etc. are contraband and cannot be entered or exited without permission. ③Safety inspection. In recent years, due to the frequent occurrence of aircraft hijacking incidents, countries generally require certain security checks for passengers boarding the aircraft. Mainly, it is prohibited to carry weapons, weapons, explosives, etc. Inspection methods include body searches, security gate inspections, magnetic detector inspections, infrared fluoroscopy, etc. ④Quarantine. Submit the yellow book, which is the vaccination certificate. Some countries are sometimes exempt from inspection. In order to prevent the spread of certain infectious diseases internationally, various countries have regulations that require certain vaccinations when traveling to their own countries, such as vaccination against cowpox, vaccination against cholera, and vaccination against yellow fever, etc. The validity period of these vaccinations is: cowpox is valid for 3 years starting from the date of re-vaccination 8 days after the initial vaccination; cholera prevention is valid for 6 months starting from the 6th day after vaccination; yellow fever prevention is valid for 10 years starting from 10 days after vaccination efficient. According to the distribution of the epidemic, different regions and different periods have different vaccination requirements, which should be understood before going through the vaccination procedures. The health and epidemic prevention stations of each province, city, and autonomous region are responsible for vaccination and issuing yellow books.