As a character he has often been regarded as antithetical to the more Confucian Lu Zhi, but in reality they seemed to agree on a number of points and Lu didn't have any problem recommending Du for his abilities.
In contrast to the more traditional views of Lu Zhi, Du was often viewed as being at odds with him, however, it is revealed that they shared common ground on numerous occasions and Lu had no reservations in recommending Du due to his exceptional abilities.