, ▁to ▁be ▁em peror ▁again ▁( as ▁Emperor ▁Ru iz ong ). ▁ ▁Li ▁J ion g xi u ' s ▁respons ib ilities ▁during ▁the ▁initial ▁stages ▁of ▁Emperor ▁Ru iz ong ' s ▁reign ▁were ▁unclear , ▁but ▁it ▁appeared ▁that ▁he ▁was ▁at ▁one ▁point ▁commission ed ▁to ▁command ▁an ▁army ▁either ▁int ending ▁to ▁attack ▁or ▁to ▁defend ▁against ▁an ▁attack ▁from ▁Eastern ▁T uj ue , ▁and ▁upon ▁his ▁return ▁from ▁that ▁mission , ▁after ▁the ▁ch an cell or ▁Y ao ▁Ch ong , ▁who ▁was ▁serving ▁as ▁minister ▁of ▁defense ▁as ▁well , ▁was ▁removed ▁in ▁ 7 1 1 , ▁Li ▁J ion g xi u ▁became ▁minister ▁of ▁defense ▁again , ▁but ▁not ▁ch an cell or . ▁ ▁The ▁last ▁historical ▁reference ▁to ▁an ▁act ▁of ▁Li ▁J ion g xi u ' s ▁was ▁in ▁ 7 1 3 , ▁shortly ▁before ▁Emperor ▁Ru iz ong ▁passed ▁the ▁throne ▁to ▁Li ▁Long ji ▁( as ▁Emperor ▁X u anz ong ), ▁when ▁Li ▁J ion g xi u ▁was ▁again ▁put ▁in ▁command ▁of ▁an ▁army ▁either ▁to ▁attack ▁or ▁defend ▁against ▁an ▁attack ▁by ▁Eastern ▁T uj ue . ▁ ▁It ▁is ▁not ▁known ▁exactly ▁when ▁Li ▁J ion g xi u ▁died , ▁although ▁he ▁was ▁said ▁to ▁die ▁at ▁age ▁ 4 9 ▁and ▁was ▁buried ▁with ▁honor . ▁ ▁Notes ▁and ▁references ▁▁▁ ▁Old ▁Book ▁of ▁Tang , ▁vol . ▁ 6 2 . ▁ ▁New ▁Book