吕元膺之所以要辞掉这位棋友，是由于他从这位棋友挪动一个棋子，搞了一个奸诈的小动作中发现了他的不诚信。
The reason for the subordinate 's expulsion was his dishonesty , which Lv had sensed from his stealthily moving a piece of chess .
吕元膺