Sign in for Thirty Years of Spiritual Energy Recovery, Guarding the Country

A mysterious substance appeared on the earth, which people called vitality. Under the stimulation of vitality, the physical constitution of humans and animals is enhanced. At the same time, some creatures collectively known as ferocious beasts have appeared. They are awakened alien beasts or mutated animals, which seriously threaten human life. People cultivate their vitality, become warriors, and fight against ferocious beasts! … Lin Yun is a warrior and a member of the Chinese Guard Army. During the second crisis of the Great Beast Cataclysm, he sacrificed his life to resist the beast tide. But he was reborn as a teenager and unexpectedly got a sign-in system. Sign in at home and get Yuanli Dan. Sign in at the Ji Dao Martial Arts Hall and gain a 50% increase in cultivation speed. Sign in in front of the corpse of the extremely ferocious beast "Jie" to obtain the essence and blood of the extremely ferocious beast. … This time, he relied on signing in and quietly became stronger. Thirty years later, when the beast tide struck again and mankind was in crisis of survival, Lin Yun stood up. "Behind me is my home, where are my relatives, friends, and people I care about. This time, you can't even think of stepping behind me!" Lin Yun, who was alone on the high wall, said this as he faced the millions of ferocious beasts rolling in front of him.