 Hu <unk> was a noted seal @-@ <unk> , producing personal seals for numerous dignitaries . His style was rooted in the classical seal script of the Han dynasty , and he followed the <unk> school of carving founded by his contemporary He <unk> . Hu 's calligraphy , although balanced and with a clear <unk> structure , is somewhat more angular and rigid than the classical models he followed . <unk> seals attempt to <unk> an ancient , weathered impression , although unlike other <unk> artists Hu did not make a regular practice of artificially aging his seals . 
