Zurich's most remote partner town is the Chinese town of Kunming. Of course real partners mutually support one another: Limmatstadt helped the southern Chinese in the upgrading of their water supply and in a sort of return gesture they sent their best master gardeners to Zurich with the job of creating an imperial garden. This very traditional garden, opened in autumn 1993, operates under the name Three Friends in Winter. This name comes from its pine trees, winter cherry and bamboo, which are fit to withstand the winter temperatures. Artfully placed ponds, small bridges, rolling hills and attractive pavilions lend it an exotic sense of peace and tranquillity. It is hardly surprising that this park receives some 43,000 visitors annually. This park, situated at the end of the Zürich Horn, is open most years until the end of October.