Core Viewpoint - The article emphasizes the importance of regular colonoscopy screenings for colorectal cancer, particularly for high-risk groups, to enhance early detection and treatment outcomes [1][2][3]. Group 1: Importance of Screening - The city conducts annual colorectal cancer screenings for residents aged 40 to 74, recommending high-risk individuals to undergo full colonoscopy examinations at designated medical institutions [1]. - Early detection of colorectal cancer significantly increases the 5-year survival rate to over 90%, compared to less than 10% for late-stage diagnoses [2]. Group 2: Prevention Strategies - Colorectal cancer typically develops through a process from polyps to adenomas to cancer, which can take 5 to 10 years; full colonoscopy can identify and remove polyps, preventing cancer development [3]. - Regular full colonoscopy screenings are recognized as the most effective method for preventing colorectal cancer by enabling early detection and removal of precancerous lesions [3]. Group 3: Clarifying Symptoms - Various gastrointestinal symptoms such as bleeding, diarrhea, constipation, and abdominal pain can stem from multiple causes, making accurate diagnosis challenging; full colonoscopy allows for clear observation of the colorectal mucosa to determine the underlying cause [4]. Group 4: Targeting High-Risk Groups - The risk of developing colorectal cancer is significantly higher in individuals over 40, those with a family history of colorectal cancer, or those with a history of polyps or inflammatory bowel disease; regular screenings can help monitor and mitigate these risks [5]. - It is recommended that the general population begin their first colonoscopy at age 45, while high-risk individuals should start as early as 40 or even younger, with follow-up frequency adjusted based on results [5].

Core Viewpoint - The integrated prevention and control model for "tumors + chronic diseases" initiated in Harbin provides an innovative systemic solution for Chinese cities to address the increasing challenges posed by chronic non-communicable diseases [1][26]. Group 1: Cancer Statistics and Trends - The latest cancer statistics from the National Cancer Center indicate that colorectal cancer has risen to the second highest incidence of malignant tumors in China [2]. - The rapid increase in colorectal cancer cases reflects a profound change in the disease spectrum in China, highlighting the complexity and urgency of prevention and control efforts [3]. Group 2: Challenges in Early Detection - Colorectal cancer is often referred to as a "silent killer" due to its extremely subtle early symptoms, making early detection challenging [7]. - Public misunderstanding of early symptoms leads to delays in diagnosis, with many mistaking symptoms for less serious conditions like hemorrhoids [9]. - Traditional detection methods, such as colonoscopy, face significant barriers including patient compliance and a shortage of qualified medical professionals, particularly in rural areas [9]. Group 3: Innovative Detection Technologies - New non-invasive molecular detection technologies, such as fecal DNA methylation testing, offer advantages in sensitivity, convenience, and public acceptance for early colorectal cancer detection [13][14]. - This technology captures and analyzes abnormal methylated DNA in feces, providing a reliable assessment of cancer risk [13]. Group 4: Harbin's Integrated Prevention Model - Harbin's initiative, set to cover 2.4 million people over three years, aims to implement a layered detection strategy combining non-invasive screening with precise diagnostic procedures [19][21]. - The project is supported by a collaboration between the Harbin Health Commission and professional institutions like BGI, ensuring effective implementation [19]. Group 5: Economic and Public Health Benefits - A cost-effectiveness analysis from Wuhan indicates a benefit-cost ratio of 1:8.55 for the new fecal DNA methylation testing, suggesting significant long-term economic benefits from early detection [27]. - Early detection can drastically reduce treatment costs compared to late-stage cancer treatment, which can reach hundreds of thousands of yuan [27]. Group 6: Broader Implications for National Health Strategy - Harbin's model not only validates a successful regional application of detection technology but also suggests a potential pathway for national health strategy transformation, focusing on integrating advanced technology with grassroots execution and innovative incentives [28].