Hello. Your height is 170cm, and your weight is standard (70kg for male and 65kg for female). A healthy way to lose weight is to eat less and exercise more. Eating less means: according to the calculation of three meals a day, you should eat 60% to 70% full for breakfast and lunch (you can eat some staple food properly), and you must eat less or no staple food and eat some meat properly for dinner in a day. Aerobic exercise (brisk walking and jogging) is the main exercise. Take brisk walking as an example: at first, the speed can be controlled at 70-80 steps per minute, and the continuous brisk walking is at least 67,000 steps. Finally, step by step. For the speed of 1000 steps per minute, keep walking 10000 steps (no need to walk10 km). After that, it is best to do proper anaerobic exercise for more than half an hour every day. In this way, you can lose at least six to ten pounds a month. I wish you all the best, health, happiness and happiness. Please adopt it. Thank you.