The Immortal Emperor is so fertile

Qin Tian traveled to the world of immortal cultivation, but was persuaded to leave by the immortal sect because of his poor physique. After returning home, he unlocked the system of imperial hegemony.
Expanding territory will make you stronger!
Having many children and grandchildren will make you stronger!
At this moment, Qin Tian realized.
This book is also known as "The Fairy Who Loves to Smile Will Not Have a Bad Pregnancy", "The Master of Time Management in the Immortal Cultivation World", "I Want to Lead the Iron Cavalry of the Great Qin to Conquer a Large Territory!"...