Locksmith of Time and Space: Twelve Ruins of Chang'an

When Wu Zetian became emperor, a "bronze corpse" was discovered in the underground ghost market of Luoyang, the capital of China, with future gears embedded in the chest of the deceased. Si Tianjian Shaoqing Pei Yan discovered that this case coincided with the lost chapter Hui Gua in "Tui Bei Tu", which involved the penetration of the roots of the time and space tree into the prosperous Tang Dynasty.