Or.12380/3948 is a Sino-Turkic Bilingual vocabulary fragment from the Stein Collection in the British Library that was published in the 5th Volume of the Khara-Khoto Documents Collected in the British Library.It was generally believed to be a Sino-Persian bilingual vocabulary manuscript dating to the Mongolia-Yuan dynasty, though it was actually unearthed from the Mazar-Tagh site in Khotan, Xinjiang, and was written in the period when Khotan was ruled by the Chinese Tang Empire. As the language turns out to be none other than ancient Turkic, this manuscript is of important historical value for studying an ancient script about which little is known.