|The Orkhon script is the earliest known Turkic alphabet. The script was discovered in an 1889 expedition to the Orkhon Valley monuments in Mongolia, which date from the early 8th century. It was later used by the Uyghur Empire; a Yenisei variant is known from 9th-century Kirghiz inscriptions, and it has likely cousins in the Talas Valley of Turkestan and perhaps the Hungarian Szekler script (Székely script). The Orkhon Valley inscriptions were discovered by Nikolay Yadrintsev's expedition in 1889, published by Vasily Radlov and deciphered by the Danish philologist Vilhelm Thomsen in 1893. The script is very similar to that on monuments left by Tu-jue (?? pinyin tú jué) in China during the Tang Dynasty.|
*rule continues as Gao Xu, first king of Northern Han Dynasty.