対華21カ条要求
Japan established the to administer the new territory, and based the Kwantung Garrison to defend it and the railway. The Kwantung Garrison later became the Kwantung Army, which played an instrumental role in the founding of Manchukuo. In negotiations with the Republic of China under the Twenty-One Demands, the terms of the lease of the Kwantung Leased Territory were extended to 99 years.