Oh, and about the question why/how you lose weight so fast: of course, it's partly because of the more water intake, but also, because you started to eat more healthily (reduced the calories) and you started to do the exercises. Your metabolism is getting better, so you're getting leaner and you'll add (soon) some good muscle mass; your skin, mood, thinking will be improved too. And all these will make you to become a really better yourself in months. And, as I promised, if you keep the good job responsibly and follow the ideas, examples, etc., in a year you'll be something like all those K-pop, or J-pop idols.
Well you mislooked. I implied I gained one kg instead of losing one kg.
Yes, it's because I didn't record your starting weight (but I trust you keep own record on it, so I skip these details basically because I am sure that you'll get the desired looks in a year and the concrete weight isn't that important). And because we already chatted it in QQ, I will paste here my answers for those who wonder what's going on:
6:17:22
if you kept the diet right, then this kilo is a pure muscle kilo.
6:17:57
water + less calories + sports = only muscle kilo, no fat.
6:19:04
So, because you look better, not fatter, continue this way. And check your weight every time AFTER the WC and without heavy clothes, shoes.
6:19:55
For example, I after WC (小便,大便), am -1 kg or -1.5 kg. It matters.
6:20:37
Yes, as I said, you look better (slimmer) so I guess it's a 1 kg of pure muscle.
6:20:53
In fact, maybe it's something like this:
6:21:27
you lost 2 kg of fat and you added 3 kg of muscle? This is the idea -- at the same time to burn fats and to build muscles.
6:23:45
But usually people should first burn the fat and then build muscles, on clean start. Otherwise you may get mixed results, but, as I said, later when your metabolism is faster and you keep the right diet and sports, you can't be in bad shape. Even with a little more fat than the pro builders, it's not a big deal, because still you'll mog 90% of the guys outside who're too skinny or too fat, or just normies.
In a nutshell: I supposed that he lost some fat weight and gained some muscle weight, because:
1/ He looks slimmer, leaner now. That one more kilogram doesn't seem to be fat related.
2/ He is a serious person and honest, I think he's not telling us lies when he reports his new low-calories diet, more water and basic sport exercises. Every person who reduces the calories intake, drinks more water and do sports is going to burn the fat and gain more or less muscle mass.