Dreaming: My Dream Connects Modern Times and the Tang Dynasty

As a descendant of Li Shimin of the Tang Dynasty, Li An also wears a yellow robe in modern times. Suddenly one day I got the Dream Travel System, which allowed me to go to the Tang Dynasty once a month and return to modern times a month later. What? Can you still carry items? Cool! ! ! I have returned to the Tang Dynasty. What should I do? Newspaper? What do I need that for? Wouldn't it be better to just go to the Internet? Typography? Is the printer not easy to use? What would it be like if Datang Technology exploded in advance... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.