The First Middleman in Tang Dynasty

What Autobot? Who knows why my family gave me such an embarrassing name 'Fang Xiangpan'! Suddenly I traveled to the Tang Dynasty with a mobile phone. The amazing thing is that I can actually buy modern things by recycling items from the Tang Dynasty. But this was during the reign of Emperor Xianzong of the Tang Dynasty, who was famous for his mediocrity in his later years, and finally died suddenly after taking elixirs. And his crown prince operation was even more speechless. Not only did he confer seven princes in the first year of his succession, but he also died after only four years as emperor. All three of his sons became emperors, and the last one to succeed was his brother. Can you change your destiny against the will of heaven? Your Majesty, you cannot die. I will take over your ruined world! The culture, military, and society are all too backward. The road to modernization and rejuvenation starts with me...