Study Medicine to Save the World of Immortality

Li Yuanhua was reborn in the world of cultivating immortals, but he turned out to be a useless cultivator? Fortunately, the system comes with endless medicinal methods. Are there almost no people left? As long as there is still breath, we can save it! Upgrade too slow? Don't stop taking drugs! No spiritual stone flowers? Let's sell a few tons of heavenly elixir first.