This paper focuses on the much-disputed problem of the birth year of Sa Dula who was a minority poet during the late Yuan Dynasty. In academic circles there are eight different views of Sa Dula's birth date, all of which are problematic. We must carefully reconsider the accuracy of those views and the supporting documentation, particularly information available in the genealogy of the Sa family. Based on new information and new interpretations, it can be proved that Sa Dula was born in the eleventh year of the Da De reign period, that is, the year of 1307.