Infinite Rewinds: All My Skills Are Maxed Out

After transmigrating to a parallel world, Lu Qing planned to lie low and slowly build up his strength. Then he discovered that he could set an unlimited number of save points and reload any of them at any time! Best of all, his skill proficiencies remained intact after reloading! “Doesn't that basically make me immortal, with every skill maxed out?!” Lu Qing's eyes lit up: “Lie low?” “Not a chance!” “Time to go wild!” … PS: This is an invincible-protagonist story.