How long is the validity of the British visa?

Legal analysis: the validity period of the British visa is 2 years (subject to the seal of the consulate or the entry and border defense bureau). A British visa is an endorsement and seal on passports or other types of travel documents held by foreign citizens who are not British nationals by a visa authority authorized by the British government to indicate the procedures for allowing them to enter and leave British territory.

Legal basis: Article 9 of the Law of People's Republic of China (PRC) on Exit and Entry Administration. China citizens shall apply for passports or other travel documents when leaving or entering the country.

China citizens who want to go to other countries or regions also need to obtain visas or other entry permits. However, unless the China government has signed visa exemption agreements with other governments or the Ministry of Public Security and the Ministry of Foreign Affairs provide otherwise.

China citizens who leave or enter the country as seafarers and work on foreign ships shall apply for a seaman's certificate according to law.