During the 12-week treatment, Sham Acupuncture will be administrated 3 times a week (once every other day) in the first 6 weeks, and twice a week in the last 6 weeks (with an interval of 2-3 days). Each treatment session will last 30 minutes.

The body weight will be reported in kg.

The body mass index is a figure obtained by dividing body weight by the square of height, in kilograms per meter^2. It is a universal indicator used in the world to measure the degree of obesity.

The fasting plasma glucose is measured by oral 75g glucose tolerance test, which is usually used to diagnose impaired glucose tolerance and observe glucose metabolism.

The fasting serum insulin is measured by oral 75g glucose tolerance test, which was used to diagnose impaired glucose tolerance and observe glucose metabolism.

Homeostasis model assessment-insulin resistance index (HOMA-IR): a mathematical model reflecting the interaction of glucose and insulin in different organs (including pancreas, liver, and surrounding tissues). It was first proposed by Matthews in 1985. Insulin resistance (HOMA-R) and islet β cell function (HOMA- β) were evaluated by fasting blood glucose value (FPG) and fasting serum islet level (FINS). The calculation method is HOMA-IR=FPG × FINS/225;HOMA- β = 20 × FINS/ (FPG-3.5). The FPG unit is mmol/L, FINS μ U/ml, and the coefficient 225is the correction factor, which refers to the blood glucose level of 5 μ U / ml plasma insulin corresponding to 45mmol/L in normal/ideal individuals.

Waist-to-Hip Ratio(WHR): the ratio of waist to hip circumference. It is an important measure for the diagnosis of central adiposity.

To measure waist circumference, locate the upper hip bone and the top of the right iliac crest. Place a measuring tape in a horizontal plane around the abdomen at the level of the iliac crest. To measure hip circumference, place the measuring tape on the horizontal plane and place it at the maximum extension of the hip.

Before reading the tape measure, ensure that the tape is snug, but does not compress the skin, and is parallel to the floor. The measurement is made at the end of a normal expiration.

SNAQ=simple appetite questionnaire. SNAQ is a short and simple appetite assessment tool that can predict weight loss in adults. It measures the amount of food per meal, the number of meals per day, and the taste of the food. It consists of four items, each with five grades, with the total score ranging from 4 to 20 points. Lower scores indicate deterioration in appetite.

IWQOL-Lite=Impact of Weight on Quality Of Life. IWQOL-Lite is an international scale used to measure an individual's health-related quality of life. A total of 31 questions are divided into five subscales: 11 questions concerning physical function, 7 concerning self-esteem, 4 concerning sex life, 5 concerning public pressure, and 4 concerning work. The score of each question is divided into five grades, with 5 representing always, 4 often, 3 sometimes, 2 rarely and 1 never. The total score of the questionnaire is 155, with a higher score indicating a worse quality of life.

TC=Serum total cholesterol, TG=triglyceride, LDL-C=Low-Density Lipoprotein Cholesterol, HDL-C=High-Density Lipoprotein Cholesterol. They are important indicators to evaluate the metabolism of blood lipids in the human body, all of which will be reported in mmol/L.

The blood pressure is measured by an OMRON upper arm blood pressure electronic sphygmomanometer. Before blood pressure measurement, subjects are required to sit still for five minutes, relax the whole body and take three slow deep breaths; during blood pressure measurement, subjects must keep their wrists still and placed at the same level as the heart. Keep calm and do not speak during the measurement. The blood pressure was measured 2 times and the average blood pressure was taken as the actual blood pressure.

compliance = (the times the Participant has received acupuncture/ the total times the Participant should receive acupuncture ) × 100% the criterion of good compliance was that the Participants had received more than 80% of treatment (including 80%).

The patient's lifestyle adjustment diary card, dietary change table, dietary compliance questionnaire, and exercise compliance scale were selected to evaluate the compliance of life modification.

Acupuncture-related adverse events(such as broken needles, hematoma, infection, etc.) and other unexpected adverse events(such as colds, falls, etc.), including their severity and possible relationship with interventions, will be recorded in detail in the patient-recorded adverse event table and the evaluator-recorded adverse event table throughout the study period. The incidence of adverse events in the two groups will be calculated at the end of the study.