I Really Don't Want to Revitalize the Tang Dynasty

What sparks will come out of the collision between the martial arts societies of Datang + Fengyun? After traveling through time and becoming the second son of Qin Qiong, Qin Huaijin just wanted to lie down. But the first day he came here was the eve of Xuanwu Gate, and his father was still hesitating about which side to take. He analyzed the situation with his father all night long - if you don't take sides, you will die sooner, and King Qin is the real one. After hearing this, my father went to Prince Qin's Mansion to propose his trump card. The next day the weather changed in Chang'an. Qin Huaijin thought he could rest. As a result, he had a door in his mind and found that he could travel into a world called "Wind and Cloud". There is a basic breathing technique here, which is a unique skill passed down from generation to generation in the Tang Dynasty. He just wants to save his family. But when he brought back the first exercise book from Fengyun and handed the improved military formation to Li Shimin's desk, and when the Turkic cavalry encountered an unprecedented torrent of steel in the Tang Dynasty - he realized that every time he "didn't want to work hard", he was pushing the Tang Dynasty up a level. The daughter-in-law of the Changsun family studied ink for him under the lamp. Princess Li Lizhi of Changle pestered him and asked, "Is it fun there in Fengyun?" Qin Huaijin looked up to the sky and sighed: I really don't want to revitalize the Tang Dynasty. But Datang behind him could no longer look back.