My Son-in-law Cultivates Immortality, and I'm Spreading My Family Line in the Cultivation World

[Son-in-law + Cultivation + Weak System + Marriage and Children + Family Establishment + Ruthless + Many Children, Many Blessings + Leveling Up by Fighting Monsters] Young Chen Fan is accidentally transported to a cultivation world, only to find himself in peril from the very beginning. While falling off a cliff, he unexpectedly activates a family cultivation system. On his first day, he becomes a son-in-law. The more children he has, the more rewards he receives from the system, such as alchemy, formations, talismans, swordsmanship, and cultivation techniques. With this cheat code, he diligently cultivates, gradually establishing himself in the treacherous cultivation world, founding a new cultivation family, and leading his clan step by step to the heavens, becoming a top-tier immortal clan.