16 minutes of 66,000 US dollars wear 4u, you calculated wrong, a month 120u wear, 880 yuan cost, unless you brush 15 points 32,600 US dollars, 2u wear, a month 60u consumption, 450 yuan cost, you haven't even calculated your account clearly, actually brushing 15 points is the most cost-effective, 16*15=240 points, can eat three in 15 days, six airdrops in a month, an average of 300 RMB each, 1,800 yuan minus 450 = 1,350 yuan profit, just do three accounts, 4,000 yuan a month.