单双公式简介：Oh my God, that's great. Are you sapient? Qin Fen couldn't help but get excited when he heard that the system would really answer, instead of just giving dry prompts like before.
Oh my God, that's great. Are you sapient? Qin Fen couldn't help but get excited when he heard that the system would really answer, instead of just giving dry prompts like before.
