Liu Zhenying (Chinese: ???; pinyin: Liú ZhènyÃng), known as Brother Yun (Chinese: ???; pinyin: Yún Dìxiong, literally "Brother Cloud"), born 1958, is an exiled Chinese Christian house church leader, evangelist, and proponent of the Back To Jerusalem movement.
Brother Yun was instrumental in the development of the Christian house church networks in China during the 1980s and 90s.
Accounts about his life and ministry are to be found in his autobiography, The Heavenly Man.