Li Hongjun pointed out that food pollution, increasing life pressure, and the prevalence of late marriage and childbearing are all reasons leading to the rapid decline in male semen quality. "Some are also affected by their professions, such as those in the decoration industry, radiology departments in hospitals, etc." Li Hongjun said, "Moreover, unhealthy lifestyles are also one of the culprits leading to a decrease in the number of male sperm, such as long-term smoking and heavy drinking."