Wasteland Blind Box, I Am Not a Player

The gray fog descends, and when Chen Xiao is about to die, he binds the blind box system to open the blind box. He relied on this to survive in the wasteland, built a stronghold, and became a force. Until the system pops up the global player ranking - No. 237, The rule is that the last player will be eliminated. What's even weirder is that a woman who is almost identical to his dead girlfriend appears. She had no memory, but she recognized him. Who is she? What exactly is this apocalypse? What's hidden in the number one reward?