Mortal Cultivation: I Forged the Su Clan Through Alchemy

[Traditional cultivation + slow pace + pseudo-ensemble cast + alchemy and leveling up + steady progress + decisive killing + nurturing father and sister + the rich helping the poor + protagonist behind the scenes in the early stages. Enter at your own risk if you dislike this style.] Su Cheng transmigrated to a world of cultivation and became a member of a low-ranking Qi Refining family. The strongest member of the family is only at the eighth level of Qi Refining. They are exploited by powerful clans outside and have no resources available inside. They rely entirely on their genius older sister, who possesses a superior spiritual root, to maintain appearances. As her younger brother, Su Cheng was naturally also expected to achieve great things. However, on the day of the test, Su Cheng's talent and aptitude were just average. But no one knew that a [Creation Furnace of Heaven and Earth] had quietly awakened within his body! Alchemy? If successful, it will be a top-grade product! Cultivation techniques? As long as the resources are sufficient, it leads directly to the Immortal Emperor realm! The outside world was too dangerous, so Su Cheng decided to stay put and develop his skills quietly, refining pills in secret and using the top-grade pills as candy, while also feeding them to his sister and family. Years later, when his genius sister was forced into marriage by the holy son of a top sect and the family was on the verge of collapse, Su Cheng sighed helplessly and walked out from the corner. "I do not agree to this marriage." In an instant, the world lost its color, and all the immortals bowed their heads!