▁capital ▁from ▁Dun hu ang ▁to ▁J iu qu an , ▁closer ▁to ▁the ▁Northern ▁Li ang ▁capital ▁Z hang ye , ▁to ▁put ▁additional ▁pressure ▁on ▁Northern ▁Li ang . ▁ ▁He ▁also ▁wrote ▁a ▁letter ▁to ▁all ▁of ▁his ▁sons , ▁which ▁is ▁still ▁ext ant , ▁encourag ing ▁them ▁to ▁be ▁open - mind ed ▁and ▁think ▁log ically , ▁and ▁be ▁m ild ▁in ▁temper ament . ▁ ▁In ▁ 4 0 6 , ▁Li ▁G ao ▁entered ▁into ▁a ▁peace ▁agreement ▁with ▁Southern ▁Li ang ' s ▁prince ▁T uf a ▁R ut an , ▁with ▁an ▁implicit ▁understanding ▁of ▁an ▁al liance ▁against ▁Northern ▁Li ang , ▁but ▁no ▁actual ▁joint ▁military ▁action ▁was ▁ever ▁taken . ▁ ▁Later ▁that ▁year , ▁Ju qu ▁M eng x un ▁made ▁an ▁attack ▁on ▁J iu qu an , ▁and ▁Li ▁G ao ▁suffered ▁a ▁defeat ▁to ▁Ju qu ▁M eng x un ▁near ▁J iu qu an ▁and ▁was ▁forced ▁to ▁return ▁to ▁the ▁city ▁to ▁defend ▁it ▁against ▁a ▁sie ge , ▁but ▁Ju qu ▁M eng x un , ▁not ▁having ▁enough ▁strength ▁to ▁sie ge ▁it , ▁with d rew . ▁ ▁Late ▁reign ▁ ▁In ▁ 4 0 8 , ▁not ▁having ▁received ▁response ▁from ▁Jin ▁when ▁he ▁sent ▁mess engers ▁in ▁ 4 0 5 , ▁Li ▁G ao ▁sent ▁another ▁mess enger ▁with ▁his ▁pet ition ▁to ▁the ▁Jin ▁capital ▁J ian k ang ▁( 建 康 , ▁modern ▁Nan j ing