I. Possible reasons for the increasing incidence include: the popularization of the concept of routine medical check-ups; the promotion of the concept of PSA screening for prostate cancer-related tumor markers; improved diagnostic techniques; and the impact of environmental and dietary changes on the incidence of tumors. Second, population aging factors also play an important role in the increase of prostate cancer incidence rate. In recent years, the trend of population aging has become increasingly obvious in Chinese society. It is expected that by 2040, the proportion of elderly people aged 65 and above in the total population will exceed 20%. At the same time, the trend of aging of the elderly population is becoming more and more obvious: the number of elderly people aged 80 and above is increasing at an annual rate of 5%, and by 2040 it will increase to more than 74 million people. As a susceptible disease for older men, it can be expected that the incidence of prostate cancer in China will continue to grow. The significant imbalance in incidence rates between urban and rural areas reflects, on the one hand, differences in the level of medical care in each region, which may lead to differences in awareness of the disease and the importance of early screening. On the other hand, it also suggests that environmental factors may play an important role in the development of prostate cancer. Evidence for this comes from two sources: 1. Several studies have shown that a Western diet high in sugar, fat, and caffeine is more likely to increase the incidence of tumors than a traditional Eastern diet of vegetables, tofu, and tea. 2. Some studies have shown that Chinese Americans have significantly higher rates of prostate cancer compared to Chinese residents in mainland China, which suggests that, in addition to differences in ethnicity, dietary environment also plays an important role in the incidence of prostate cancer. It also shows that in addition to the differences between races, the dietary environment is also an important factor closely related to the incidence of prostate cancer.