My Lifespan Can Stack

Lin Chuan transmigrated and was dumped at the start. His fiancee threw down a divorce letter and was about to leave, but he pulled out an account book and calculated on the spot: 'Spirit stones 500, spirit chicken one pair, spirit ganoderma one plant, total 1200, settle up before you go.' Everyone was stunned. With the betrothal gift in hand, the divorce was successful. That night, the system activated—[Lifespan Days System] + [Everything Sign-in System]. Can see how many days others have left? Kill to steal lifespan? Stay in a room and sign in to get stronger? Lin Chuan understood: the world is big, survival is paramount. While others fight, I farm; while others grab treasures, I sign in. Whoever dares to step on my face—count how many days you have left, and whether it's enough to compensate for my mental damage. You think I'm a loser? Actually, I'm a hidden boss. You think I'm easy to bully? I just don't bother to act. Revenge is served on the spot, never overnight. A funny cultivation story, focused on happy lying down and winning. — Description from novelcodex.org