In the early 20th century, a series of changes happened in Victoria Prison. The existing F Hall, representing the door to the interior of the prison, was completed in 1913. It was used as a printing factory for prisoners to work and acquire skills. In 1931, F Hall was rebuilt as a two-storey building and a "weaving area" was added. After the Japanese Army invaded Hong Kong during World War II, many parts of the Prison, including F Hall, were severely damaged. F Hall was rebuilt in 1948 and was re-opened as a Government printing workshop (i.e. the former Printing Department). In 1956, the ground floor of F Hall was converted to an office and reception centre of the prison. The Victoria Prison finally closed down in early 2006.