Doctors don't have to make a direct profit to answer questions. The question-and-answer mode is originally a place where people gather, and users are very sticky. A professional doctor's answer can attract more people, give people authority and highlight the brand. With loyal users, you naturally don't worry about money. Health products are all profiteering, and advertising alone is enough to earn. 39 is the largest website in the health category, and the national ranking is also in the front. With the scale of the website, you don't have to frown when you spend money to hire some doctors. What's more, with 39% traffic and popularity, it can also be used as a platform for doctors to improve their popularity. Big websites pay more attention to brands and services, and not everything is directly profitable.