Start with Lumberjack and Upgrade

If you had the chance to start a second life, would you? A dimensional storm sweeps the globe, sending human souls traversing dimensions to begin their second lives. Some become kings, prime ministers, princesses, dukes, grandmasters, generals, monks, thieves, immortals, and demon lords... others become beggars, fishermen, boatmen, blacksmiths, bandits, and rebels... Zhang Yuan travels through time and space to become a lumberjack. He contemplates abandoning his second life and living in seclusion, but unexpectedly discovers that his skills can be infinitely upgraded. Years later, the time traveler unleashes chaos, forcing Zhang Yuan to leave Shilipu. With a single blow, he defeats the world's greatest martial arts master. The master asks: What kind of swordsmanship is this? I've mastered thousands of years of martial arts, and yet I've never seen it before? Zhang Yuan: 999-level woodcutter's swordsmanship!