Mortal Cultivation of Immortality: Starting from Scientific Alchemy

[Mortal flow + no system + no heroine + decisive killing + alchemy + sword cultivation] Beichen was unemployed in middle age and then failed the public examination. After traveling to a world of immortal cultivation, he found that the miserable situation was happening again. However, he relied on the incredible luck and knowledge of drug research and development in his previous life to change the alchemy system in the world of immortality and achieve enlightenment.