The "Ping'an Tie", or "Letter of Peace", a famous work of running script calligraphy by 王羲之 wáng​xī​zhī from the Eastern Jin Dynasty. The original is lost, but a Tang Dynasty tracing on yellow paper is held at the National Palace Museum in Taipei. It is often displayed alongside the 何如帖 hé​rú​tiě and 奉橘帖 fèng​jú​tiě.