In general, the standard weight of 175cm is often calculated as 66.5kg for boys and 63kg for girls. standard weight is often called ideal weight, and the calculation of ideal weight in China is often calculated by the method prescribed by the World Health Organization, that is, standard weight (kg) for boys = (height cm – 80) × 70%, and standard weight (kg) for girls = (height cm -70)×60%. Usually the actual measured weight is compared with the standard weight, and the data can reflect the nutritional status of the body, and the data can be calculated using the formula: actual weight to standard weight ratio (%) = (actual weight – standard weight) ÷ standard weight derived. When the data ratio of ± 10% represents the body’s nutritional status is good or normal; the ratio of more than 10-20% is overweight; the ratio of less than 10-20% is thin; the ratio of less than 20% is severely thin, the body may be in a state of severe malnutrition at this time. China also commonly used body mass index (BMI) to assess obesity and wasting. the formula for calculating BMI is: BMI = weight (kg) ÷ height (m)2, adult BMI value in the range of 18.5-24.9kg/m^2 is normal, beyond the range for obesity, below for wasting. In addition, obesity and overweight are inducing factors for diseases such as hypertension, hyperlipidemia, diabetes, polycystic ovary syndrome, etc. It is recommended that correct scientific weight loss methods to maintain physical health; and when thinning, it is necessary to maintain a balanced diet to supplement nutrition and avoid diseases such as anemia and hyperthyroidism. Regardless of whether you are obese or thin, you need to go to the hospital promptly when your body shows abnormal symptoms to achieve early detection, early diagnosis and early treatment.