Records of the Three Kingdoms
The only surviving source for Du Ji's biographical information is the "Records of the Three Kingdoms", in which his life history is related unusually hagiographically. Conversations with no possible recorders are presented, and Du Ji is portrayed as a perfect, sagely governor who taught his subjects industry, culture and loyalty to the death. This is perhaps one of the faults of the "Records of the Three Kingdoms" inherited from the "Book of Wei", whose authors would have been sensitive to the fact that Du Ji's grandson was the emperor's uncle.