▁hat ▁or ▁cap , ▁it ' s ▁office ▁hours ," ▁imp lying ▁that ▁it ▁is ▁almost ▁always ▁office ▁hours . ▁ ▁Ch ang ▁e ats ▁most ▁me als ▁at ▁the ▁d ining ▁hall . ▁He ▁keeps ▁an ▁office ▁in ▁the ▁academic ▁center , ▁holds ▁regular ▁office ▁hours ▁and ▁teach es ▁a ▁t ' ai ▁chi ▁class ▁on ▁Sund ays ▁for ▁his ▁residence ▁hall ▁neighb ors . ▁ ▁Ch ang ▁is ▁the ▁spons or ▁for ▁the ▁program ▁Pap ers ▁with ▁the ▁Prof , ▁as ▁well ▁as ▁other ▁random ▁events ▁throughout ▁the ▁school ▁year . ▁He ▁has ▁hosted ▁a ▁mart ial ▁arts ▁movie ▁night ▁in ▁the ▁past . ▁He , ▁along ▁with ▁Unit ▁ 1 ▁live - in ▁fac ulty ▁member ▁Dun can ▁Williams , ▁have ▁appeared ▁at ▁Cross ro ads ▁during ▁final s ▁week ▁with ▁free ▁m uff in ▁to ps ▁to ▁students ▁studying ▁for ▁final s . ▁Ch ang ▁express es ▁interest ▁in ▁mart ial ▁arts ▁films , ▁as ▁well ▁as ▁t ' ai ▁chi . ▁Ch ang ▁is ▁an ▁av id ▁travel er ▁and ▁has ▁visited ▁ 4 7 ▁states ▁in ▁the ▁United ▁States , ▁mostly ▁by ▁Grey h ound ▁Bus ▁or ▁rail . ▁He ▁is ▁also ▁a ▁fan ▁of ▁auto ▁mechan ics , ▁and ▁collect s ▁used ▁police ▁cars ▁from ▁au ctions , ▁ear ning ▁him ▁the ▁nick name ▁" C op ▁Car ▁George ". ▁ ▁Ch ang ▁encourag es ▁as ▁many ▁students ▁and ▁residents ▁as ▁possible ▁to ▁add ▁him ▁as ▁a ▁friend ▁on ▁Facebook . ▁He ▁lik es ▁to ▁comment