It is best to sell 80 Lingbao. Of course, this can be done slowly. If you sell 60, you can support a number. You only need 50 skills to 60, and then you can learn 40 from NPC. In this way, having a vitality of 4,500 is similar to keeping a number, and then gradually upgrading and keeping in good health. As long as the vitality is above 700, you can consume one card and earn two cards. How to calculate it depends on your situation. Anyway, an 80-year-old needs 42 points of vitality, 70 needs 38 points of vitality, and one hour is 700 points of vitality, 5 minutes plus 9: 60 minutes plus 108 points. You can do it twice and a half, plus manual work and failure probability, and you can definitely make money. At least 700 vitality