Eating Dirt in a Bygone Era With a Useless System

Zhan Yan is a modern-day gaming enthusiast. One day, a link sends her to an era when even food and clothing are hard to come by. She transmigrates into a large family with many children. Every member of the family is a self-serving opportunist. Right now, another wave of educated youths is being sent down to the countryside. The whole family is urging Zhan Yan to sign up. But there's no way she's going. Before her family can act first and tell her later, she gets married. She marries Lu Nan, a soldier who returned home injured and is being pressured by his family to wed. Let's see how she survives here with her useless System!