The Mountain Village Doctor Cultivates Immortality

A Story About an Ordinary Person Cultivating to Immortality

I'm looking for something like The Ordinary Man's Cultivation: From Con Artist to Immortal Venerable. He becomes a "qigong master" in a park, swindling people to scrape together cultivation resources; he has an epiphany and reaches Foundation Establishment on a rush-hour subway, then a lightning tribulation wrecks an office building's air conditioner and costs him his life savings; his golden core looks like a lump of coal.