Having Already Negotiated with the King of Hell Since I Traveled Back to the 1970s, What's There to Be Afraid of?

In modern times, Zhou Xiaoxiao bought a ring for 10 yuan, which unexpectedly unlocked a spatial dimension. With her meager savings, she stockpiled some supplies, hoping to have some buffer time should a major event occur. However, she never expected to arrive in this harsh era. With no other choice, she could only roll up her sleeves and get to work.