Dreams of the Tang Dynasty

Jianghu, named Wanzhou. Just because he commented that Tang Taizong was "not a good person" in history class, he was transported to the Zhenguan period of the Tang Dynasty to face Li Shimin in person. From the first day of time travel, he was targeted by the mysterious organization. Do the five cities on the twelfth floor and the white jade capital in the sky exist? . The truth of history can only be found in the fragments of history books. Jiang Hu was lucky enough to experience the Zhenguan rule in person. What kind of emperor did he face? What kind of Tang Dynasty are we visiting?