I've Cultivated Immortality, and Now You Want Me to Farm to Stay Alive?

Blurb: [Updates resuming soon. Revising in progress] Qi Lecí never expected that after finally surviving his tribulation, he'd open his eyes not in the Immortal Realm but back in the little world where he'd lived in his previous life. And the one who dragged him back was a brainless System that got the timing wrong. [Ding! The Farming-to-Extend-Your-Life System is activated!] [At 23, after graduating from a top university, you pass an interview and land a job at a major company. You then learn that you're the chairman's biological younger son, switched at birth. Jealous and resentful of the rich life you missed out on, you scheme your way back into the wealthy family and constantly pick fights with the fake young master... In the end, you die in a car accident. Your body goes unclaimed and is eventually donated to a medical school for anatomy classes.] [Your life is so tragic that your lifespan is estimated at less than 30 days. The Farming-to-Extend-Your-Life System is activating automatically!] [Ding! Your beginner's task has been issued...] Qi Lecí: ??? I've already survived my tribulation and become an immortal. And now you're asking me to farm to extend my life? Reading guide: 1. A slice-of-life farming and food story. The whole novel is basically about growing things, eating things, and selling things. 2. Set in a mountain village in Southwest China, with plenty of Sichuan dialect. Theme: Live life positively and enjoy the passing moments.