According to experts from Shanghai Wanzhong Plastic Surgery Hospital, fat-dissolving needles and thin arms are used to melt fat through high-tech treatment. Fat-dissolving solution is directly directed at obese parts and injected into subcutaneous fat layer for physiological fat-dissolving reaction, which selectively acts on subcutaneous fat tissue and microcirculation system, so that fat can be gradually dissolved and eliminated, and the purpose of overall weight loss and local body shaping can be achieved under safe and painless conditions.