Casting immortality in the furnace

If heaven and earth are the furnace, creation the craftsman, yin and yang the charcoal, and all things the copper, what sword will be forged? I now possess this furnace, using true techniques as the craftsman, essence and blood as the charcoal, and spirit and energy as the copper. After enduring thousands of years of heat and cold, can I attain immortality? ... Across the vast land of China, dragons and snakes rise on the path, and countless heroes emerge. Fan Zhou unexpectedly arrived in this world, and can only rely on the celestial furnace within his body to continuously evolve various cultivation methods, attempting to forge a path to immortality.