Lanxi, alternately known as Lanchi and Lanki, is a county-level city under the administration of the prefecture-level city of Jinhua in west-central Zhejiang Province, east-central China.

The city executive, legislature and judiciary are at Lanjiang Subdistrict (兰江街道), together with the CPC and PSB branches.

The town lies on the Lan River (Lanjiang), a tributary of the Fuchun River, both north-flowing; the Fuchun River empties into Hangzhou Bay.

Notice that Lanjiang Zhen had been cancelled and changed into Lanjiang Jiedao.

Notice that some of the area of Nyubu had been accepted by Lanjiang Jiedao.