The Yanji-Changchun Expressway (simplified Chinese: 延吉－长春高速公路; traditional Chinese: 延吉－長春高速公路), designated as G1221 and commonly abbreviated as Yanchang Expressway (Chinese: 延长高速), is an expressway in Jilin, Northeast China linking the cities of Yanbian and Changchun, Jilin.

Note: italic indicates the routes that were available in 2013 network plan, but removed in 2022 network plan