Metformin is not a treatment for polycystic ovary syndrome, but for insulin resistance and obesity caused by polycystic ovary syndrome. Polycystic ovary syndrome is an endocrine disease, so it is often combined with insulin resistance and dyslipidemia, so these women will have obvious obesity and insulin secretion abnormalities, so they need to take metformin for symptomatic management, both to reduce blood sugar and to play a role in weight loss. For women with polycystic and obesity, metformin is especially suitable for them to take metformin together with Daing-35 for overall management.