Searching for the Origin of Zhenguan and Investigating the Road Through Historical Writing

After waking up, Su Xuan, a researcher of ancient books, traveled to the Tang Dynasty in the third year of Zhenguan. At this time, it had been nearly a thousand years since Laozi left Hangu in the west. Later generations of alchemists fabricated it out of thin air, claiming that Lao Dan returned to his secluded room to refine elixirs. Attachments to Guyang's hometown emerged one after another, and all kinds of man-made miracles sprang up everywhere, trying to gain incense in the name of the saint. False legends are prevalent, and no one studies the official historical records. The emperor issued an edict to search for the origin of the avenue, and Su Xuan was ordered to visit the Central Plains. The illusion of the machine can be shattered in one fell swoop, but the obsession with pseudo-history rooted in people's hearts is the most difficult to eradicate. Debating stone tablets, breaking scams, and investigating falsehoods, he ran all the way from Luoshui to Guyang and arrived at Xiongguan in Hangu in the west. Use modern textual research logic to counter the false talk of the Tang Dynasty, and rely on Qing's brief history books to determine the eternal orthodoxy.