I Renew My Virginity in the Tang Dynasty

Qin Xuan traveled through time. It's a pity that when he came, it was already the autumn of the 19th year of Zhenguan. The most powerful carbon-based creature in the seventh century, the only true god of the Tang Dynasty, had less than four years left to live. Some people say that leaving at the right time is God's grace. Qin Xuan doesn't think so. Datang cannot live without him! Without him, can the Tang Dynasty still be called the Tang Dynasty? Qin Xuan didn't want to go through the experience of inheriting Zhenguan and starting Kaiyuan. He wanted Zhenguan to continue forever. If not forever, Qin Xuan hopes that Zhenguan can be directly connected to Kaiyuan. Qin Xuan felt that this request was not too much... However, there is a prerequisite, which is to let the god of the Tang Dynasty continue to live.