Since Ku-tsung was the incarnation of a red cedar it was necessary for his enemy to chop down the tree in order to rob him of his strength. Though the soldiers tried, their axes would not penetrate the wood.
有人建議，骨宗乃茄苳樹化身，必須先砍樹，以散其元神；但是當吳昌祚派兵伐樹時，居然斧鋸不入。