) ▁while ▁continu ing ▁his ▁gradu ate ▁studies ▁at ▁P ek ing ▁University . ▁ ▁In ▁ 1 9 7 3 , ▁C ai ▁was ▁transferred ▁to ▁the ▁Department ▁of ▁History ▁of ▁Nan j ing ▁University , ▁where ▁he ▁taught ▁until ▁ret irement ▁in ▁ 2 0 0 3 . ▁There ▁he ▁ad vised ▁more ▁than ▁ 8 0 ▁gradu ate ▁students ▁and ▁post do ctor al ▁research ers , ▁as ▁well ▁as ▁over ▁ 7 0 ▁international ▁sch ol ars ▁including ▁Elizabeth ▁J . ▁Perry , ▁who ▁later ▁dedicated ▁her ▁book ▁Any uan : ▁M ining ▁China ' s ▁Revolution ary ▁Trad ition ▁to ▁C ai ▁Sh ao q ing ▁and ▁Yu ▁J ian rong . ▁ ▁From ▁ 1 9 8 0 , ▁C ai ▁was ▁invited ▁to ▁teach ▁at ▁over ▁si xty ▁univers ities ▁and ▁research ▁instit utes ▁in ▁more ▁than ▁ten ▁countries . ▁He ▁was ▁named ▁an ▁" Out standing ▁Gr adu ate ▁Student ▁Ad visor " ▁by ▁the ▁government ▁of ▁Ji ang su ▁province ▁and ▁won ▁the ▁Freder ic ▁Mil ton ▁Th r ash er ▁Award ▁for ▁his ▁research ▁on ▁Chinese ▁secret ▁soci eties . ▁ ▁C ai ▁died ▁on ▁ 3 0 ▁November ▁ 2 0 1 9 ▁in ▁Nan j ing , ▁aged ▁ 8 6 . ▁ ▁Cont ribution s ▁ ▁C ai ▁is ▁recognized ▁as ▁a ▁leading ▁authority ▁on ▁the ▁history ▁of ▁Chinese ▁secret ▁soci eties . ▁ ▁While ▁still ▁a ▁young ▁scholar , ▁he ▁published ▁the ▁article ▁On ▁the ▁Orig ins ▁of ▁the