Editorial and Medical Review Standard

I. Purpose & MissionThis platform focuses on cardiovascular health popular science for Chinese readers worldwide. It is committed to delivering accurate, objective, and accessible cutting-edge knowledge in cardiology. Content covers major cardiovascular diseases including coronary heart disease, heart failure, arrhythmia, valvular heart disease, congenital heart disease, hypertensive heart disease, cardiomyopathy, as well as cardiac surgery, interventional therapy, pharmaceutical advances, cardiac rehabilitation, and cardiovascular disease prevention.II. Content Principles2.1 AccuracyAll cardiovascular popular science content must be based on authoritative sources, including but not limited to:• Clinical guidelines and scientific statements issued by the American Heart Association (AHA), American College of Cardiology (ACC), and European Society of Cardiology (ESC)• Guidelines and standards released by the National Health Commission of the People’s Republic of China, National Medical Products Administration (NMPA), and Chinese Society of Cardiology of the Chinese Medical Association• Cardiovascular disease-related reports published by the World Health Organization (WHO), U.S. National Institutes of Health (NIH), U.S. Centers for Disease Control and Prevention (CDC), and UK National Health Service (NHS)• Peer-reviewed top international cardiovascular journals (e.g., Circulation, Journal of the American College of Cardiology (JACC), European Heart Journal, JAMA Cardiology, The Lancet, New England Journal of Medicine (NEJM))• Approved cardiovascular drug instructions and medical device approval announcements issued by major global drug regulators: U.S. FDA, European EMA, Japan PMDA, and China NMPA

• Patient education materials released by world-renowned medical institutions such as Mayo Clinic, Cleveland Clinic, and Johns Hopkins HospitalFolk remedies, health product promotions, and treatment methods lacking evidence-based support are prohibited from citation.2.2 ObjectivityContent shall remain neutral and objective, taking into account diverse academic viewpoints. For controversial cardiology topics, mainstream differing medical stances must be presented truthfully without one-sided exaggeration of a single viewpoint or therapy.2.3 ReadabilityTargeting non-medical professional Chinese readers globally, professional cardiology terminology shall be explained in plain language. Metaphors, charts and graphs are encouraged to aid comprehension, but simplification shall not compromise accuracy.2.4 TimelinessPublished content shall be reviewed regularly; outdated information shall be updated or marked accordingly. Major advances in cardiovascular medicine shall be covered promptly following official release.III. Editorial WorkflowThe platform implements a three-review and three-proofreading system. Written or digital records of every review round for each article shall be retained for no less than three years:1. Preliminary Review (Qualification & Topic Review): Editors verify topic alignment and source credibility, review and archive authors’ qualification documents (academic certificates, practicing licenses, etc.).2. Secondary Review (Medical Fact Verification): Medical consultants with cardiovascular expertise fact-check all content to guarantee medical accuracy and sign off on review comments.3. Final Review: Editor-in-Chief conducts final checks on overall content quality, compliance, and

reader experience.4. Three Rounds of Proofreading: Separate checks for textual accuracy, standardized medical terminology, layout formatting, and valid hyperlinks.IV. Author Qualification Requirements• Authors of cardiology popular science articles must hold a medical-related background, or possess medical popular science writing experience with articles reviewed by cardiovascular specialists.• Authors are required to submit academic certificates, practicing licenses and other qualification materials for review and archiving upon approval.• Content involving clinical diagnosis and treatment recommendations must be written or reviewed by licensed physicians.• Each article shall clearly state the author’s name, professional background, and reviewer information at the end.V. Disclaimer⚠ All content on this platform is for cardiovascular health popular science reference only and does not constitute medical diagnosis, treatment advice, or medication guidance. Seek immediate medical attention if symptoms such as chest pain, palpitations, or dyspnea occur. The platform bears no liability for any medical decisions made relying solely on content published herein.VI. Notice for Global ReadersThe platform serves Chinese users worldwide. Cited international medical information may vary due to differing national/regional medical regulatory policies, drug approval statuses, and clinical practice guidelines. Readers shall combine local conditions and follow professional medical advice when referencing platform content for medical decisions.VII. Correction & Feedback

Global readers may submit feedback via official platform channels if errors or questionable content are identified. Upon verification, the editorial team will implement corrections within five working days and mark the correction date publicly.VIII. Conflict of Interest DisclosureAll authors and editors must disclose potential conflicts of interest relevant to their articles, including but not limited to commercial collaborations with cardiovascular pharmaceutical/device enterprises exceeding RMB 50,000 in the past three years, research grants, and equity holdings. Standardized conflict-of-interest disclosure templates are provided by the platform. If no conflicts exist, the following statement shall be included at the end of articles: “The author declares no relevant conflicts of interest.”IX. Retention of Review RecordsComplete review records (preliminary, secondary, final review, plus three proofreading rounds) for each article are stored in written or digital format, including reviewer names, review timestamps, review comments, and revision notes. All records shall be preserved for a minimum of three years for evidence in case of disputes.X. Version Update RecordsThese Editorial Guidelines take effect upon release. The editorial team will revise them periodically in response to evolving industry standards, and the latest version will be posted publicly on the platform