2. Prevent cancer. Cancer is a big killer endangering human health and life. Now it is an incurable disease in clinic. Therefore, in order to reduce the harm of this disease to the body, it is necessary to prevent this disease from happening at ordinary times. Tieguanyin is a rare anti-cancer food. After brewing and drinking, it can make the human body absorb a variety of natural anticancer components, prevent human cells from becoming cancerous, and significantly reduce the incidence of cancer.