I understand that the health care one-on-one column hotline is completely free. Call anytime if you want to consult. Consultation is free, but if you want to buy products during the consultation or at other times, you have to pay for them yourself ~ the experts they hired will tailor the products for you according to your description and recommend the corresponding products. There is also a one-on-one health care column, which is still good after sale. You can receive the information you want in time and answer questions with great enthusiasm. And they will also take the initiative to pay a return visit to the buyer's effect after use, which is quite humanized and praised.