I'll know if this elf is good or not

Introduction: "The more you do any job, the more experience you have. For example, if this wire has electricity, I can tell it by touching it with my hand." Su Bai traveled to the age of elves, and he could get detailed information about everything he touched.Su Bai: It's really cool to open it. Others have to rely on luck to subdue the elf, but I'm different. I'll know if this elf is good or not.