The Descendants of Mao Shan 1

Starting from the Qin Dynasty, the national treasure seal made of Heshibi is the symbol of the government and the only representative of the emperor's authority. Since the Yuan Dynasty, the imperial seal suddenly disappeared without any reason. Although Emperor Zhu Yuanzhang of Ming Dynasty searched many times, there was still no news. Hundreds of years later, young Zhang Guozhong was given a copy of Mao Shan Tu Zhi by chance, which accidentally became the last leader of Maoshan Taoist school. At the same time, a piece of silk taken from the belly of the body discovered led him to find the way to pass on the imperial seal... Where is the imperial seal? What is the dispute between the imperial seal and Maoshan Taoist school?