After Getting the Serenitea Pot, I Farmed My Way to Glory in the Apocalypse

【No romance, Genshin Impact fan fiction, beast-taming, post-apocalyptic farming + starting a business in another world】 Reborn two months before the apocalypse, Su Qingwan activates the Serenitea Pot, an item that lets her travel between two worlds. Thus begins her life as a trader shuttling between them. She hires alchemists to develop crops that can withstand the cold and produce bountiful yields... She studies the energy mechanisms of Iron Armor Kabuto... She introduces gentle pack animals... Wait, I only wanted to farm and live safely through the apocalypse with my brother. How did I suddenly become Teyvat’s richest person?