After Becoming a Dead Soldier, She Completely Lay Down

Su Cancan, a modern heart disease patient, traveled through time and became "Canxing", a dead soldier who disguised himself as a man in ancient times and struggled to survive in the League of Dead Soldiers in Prince Jing's Mansion. Accidentally activate the lying flat system, get various rewards by completing the messy tasks, and get rid of King Jing's poison control little by little. Let's see how the heroine lays flat all the way until she gets everything~