Core Viewpoint - The article highlights concerns regarding the accuracy of health check-ups conducted by Aikang Guobin, particularly in detecting cancer, as multiple users report misdiagnoses and missed diagnoses leading to severe health consequences [1][3][12]. Group 1: User Experiences - A woman who had regular check-ups for 10 years at Aikang Guobin was later diagnosed with kidney cancer, raising questions about the reliability of the tests [1][4]. - Users reported instances of misdiagnosis, such as one individual being told their kidneys were normal only to be diagnosed with kidney cancer shortly after [1][4]. - Another case involved a man whose oral examination indicated only minor issues, yet he was later diagnosed with tongue cancer, suggesting a failure in the screening process [6][8]. Group 2: Company Response and Accountability - Aikang Guobin stated that the detection of cancer depends on various factors, including the timing of the tests and the methods used, and they would take responsibility if found at fault [1][6]. - The company has faced criticism for its lack of communication with affected families and for not addressing complaints adequately, leading to perceptions of evasion of responsibility [6][9]. - Users have expressed frustration over the complicated and costly process required to seek accountability from Aikang Guobin, which they feel is designed to deter claims [6][9]. Group 3: Testing Methods and Efficacy - The article discusses the "carcinoembryonic antigen (CEA) test," which is used as a tumor marker but has limitations in specificity and sensitivity, leading to potential false negatives and positives [10][11]. - Experts generally do not recommend the CEA test as a routine screening method for healthy individuals due to its low specificity [11][12]. - Aikang Guobin claims to serve around 10 million individuals annually, but the rising complaints about inaccurate results could jeopardize their reputation and user trust [13].