This is a Liao Dynasty epitaph excavated in the 1970s in the Kulun Banner Nailin manuscript, with a length and width of 140 cm, a thickness of 42 cm for the Zhi Gai and the Zhi Body, and the Zhi Gai is in the form of a bucket. The flat top is engraved with Chinese character seals: 3 lines and 12 characters "Inscription of the Tomb of the Late King of Chu of the Great Khitan Kingdom", 4 sides are engraved with flowers and 12 figures with 12 genus headdresses, and the inscription is 54 vertical lines of up to 58 characters per line, at least 25 characters, a total of more than 2,000 words, is the epitaph of Xiao Xiaohui, the Privy Counsellor of the Great Liao and the King of Chu.
At the beginning of the 10th century AD, the Khitan people established the Liao Dynasty, which was established for more than 200 years, implemented the political system of "one country, two systems", and successively created the Khitan characters and khitan small characters and chinese characters used in parallel. From 1972 to 1985, the Jilin Provincial Archaeological Task Force and the Inner Mongolia Autonomous Region Institute of Cultural Relics and Archaeology cleaned up 8 large mural tombs in the Kulun Banner Nailin Manuscript Liao Tomb Group, and unearthed epitaphs, murals and other artifacts, these stone carvings and painting archives preserved in the ground have become valuable materials for studying the politics, economy, culture and relations between various ethnic groups in the Liao Dynasty.