《旧唐书·列传·卷一百零八》
又创立儒宫，以招徕学者。虽然郑余庆力求使自己的行为成为表率，却往往近于矫情求誉，所以当时舆论并不全都赞扬他。
又创立儒宫以来，学者虽行己可学，而往往近于沽激，故当时议者不全德许之。
He also founded Ru Gong to attract scholars. Although Zheng yuqing hoped to make his behaviour a model, it often seemed artificial and self-seeking, so public opinion at the time was not all praise for him.