I found out a way to keep increasing muscle weight while not gaining fat weight at all and I keep doing this and get minus fat percentage. The problem is the fat lose increasing exponentially and when I decide to bulk up back some calculation might be broken and reduce the fat even more. The night before I eat up all the calories is around -2 kg, but after I take like 6k calories the fat lose is -15 kg while muscle gain caannot keep up and made my body weight minus as well.