The Copper Coins of the Nine Gates Corrode the Bones

This is a 18th fanfic based on abo's worldview. It may be a bit OOC, so please don't read if you don't mind. Three copper coins can predict the world's affairs, but they cannot predict the cause and effect between him and Zhang Qishan. When Qi Tiezui accidentally split up deep in the underground palace, and when Zhang Qishan used a mark to pull him back from the edge of losing control, brotherly loyalty became the weakest disguise. He is his endless love calamity, he is his inescapable prison. "The bait has been cast, waiting for the fish to bite the hook" - a note that makes trust collapse. "Qi Tiezui, you are my biggest hidden danger!" Zhang Qishan looked at the evidence he dug out with his own hands, his eyes like knives. But the real bone-eroding poison is never in the conspiracy, but in the heart. When the Japanese artillery fire dyed the night sky of Changsha red, when the evil magic of the "shadow hall" quietly spread, Copper coins hit the ground, and the cracked lines point to the same destination—— He held a spear for him in the flames of war and broke through the formation, and he divined life for him in desperate situations. It turns out that this bone-eroding bondage is doom and the only way to survive. In troubled times, copper coins corrode bones. A huge gamble with your life between the tomb and the battlefield. If the hexagrams have already determined that you and I will end up together by different paths, why should we be afraid of this bone-gnawing pain?