I Was Doing Intelligence Work in the Late Tang Dynasty

A modern white-collar worker who died suddenly while working overtime woke up to find that he was the son of a warlord in the late Tang Dynasty. After becoming one of his own under the one-eyed tycoon Li Keyong, he was thrown into Chang'an to work as a high-profile spy, and everyone shouted for beatings. If there is no money, no one, and no backing, he will make money while others engage in political intrigues, and he will open a tea stall while others form cliques. I wanted to get by with historical knowledge, but I unexpectedly discovered that in this dilapidated house of the Tang Dynasty, there are still a bunch of old men desperately trying to paste paper - which one is more reliable, saving a dynasty that is destined to perish, or rebuilding a new world?