Song Yuzhi with the system in Datang

What will happen when Song Yuzhi brings the system to Datang?Is Li Xiuning a good sister?Let me go, don't be funny, okay?Song Yuzhi swears that even if he likes Xu Ziling's Mensao, he won't like that playful Kou Zhong!But who knows the truth?Mission rewards are still random?The heavens are spirited, the earth is spirited, don’t get Kou Zhong’s stinky socks : Protagonist: Song Yuzhi┃ Supporting role: Kou Zhong Xu Ziling