How to renew your UK visa when it expires?

Legal Subjectivity:

The time required to apply for a British visa is generally fifteen days, and the visa is generally valid for six months after completion. According to my country's "Exit and Entry Administration Law", Chinese citizens leaving and entering the country must apply for a passport or other travel documents in accordance with the law. Legal objectivity:

"Implementation Rules of the Law of the People's Republic of China on the Exit and Entry Administration of Citizens" Article 17 The passport of the People's Republic of China is valid for five years and can be extended twice, each time without delay. more than five years. Application for extension should be made before the expiry of the passport validity. When abroad, passport extensions are handled by Chinese diplomatic missions, consular offices or other overseas agencies authorized by the Ministry of Foreign Affairs. At home, passport extensions for Chinese citizens who have settled abroad are handled by the public security bureaus (bureaus) of provinces, autonomous regions, and municipalities directly under the Central Government. ) and its authorized exit-entry administration department of the public security organ; for citizens residing in the country, the passport extension before leaving the country shall be handled by the exit-entry administration department of the public security organ where the certificate was originally issued or where the residence is registered.