Yotchiangrai ya zama sarki bayan rasuwar kakansa, Sarki Tilokkarat, a shekara ta 1487. Shi jikan Sarki Tilokkarat ne da ake girmamawa kuma ya hau gadon sarauta bayan yarinta.An kashe mahaifinsa ne saboda zargin rashin aminci.^[8] A lokacin mulkinsa na shekaru takwas, ^[9] Yotchiangrai ya gina haikalin Wat Chedi Chet Yot don girmama kakansa.^[9] Duk da haka, lokacinsa na sarki bai kasance cikin kwanciyar hankali ba, saboda yana fuskantar rikici da masarautun makwabta, musamman Ayutthaya .A shekara ta 1495, ko dai saboda zabinsa ko kuma matsin lamba na wasu, ya sauka, ya ba dansa mai shekaru 13 hanya.^[10]Mulkinsa, tare da mulkin kakansa da ɗansa, ana ɗaukarsa "Golden Age" na masarautar Lan Na.^[11] Wannan zamanin an yi masa alama da haɓakar fasaha da koyo.Chiang Mai ya zama cibiyar fasahar Buddha, yana samar da mutum-mutumi na Buddha na musamman da zane a wurare kamar Wai Pa Po, Wat Rampoeng, da Wat Phuak Hong.^[12] Baya ga mutum-mutumi na dutse, lokacin kuma ya ga fasahar tagulla na Buddha.^[13] An kuma yi amfani da wannan ƙwarewa a cikin tagulla wajen ƙirƙirar allunan dutse waɗanda ke nuna gudummawar sarauta da sanarwa mai mahimmanci.^[14]