Beyond the articles of association and shareholders' meeting resolutions, closely held companies commonly rely on shareholders' agreements to establish private ordering in corporate governance. Delineating the legal effect of these agreements bears directly on the balance between shareholder autonomy and the company's independent legal personality, and thus stands as a central issue urgently in need of clarification under Chinese company law. Existing scholarship has recognized the dual nature of shareholders' agreements as both contractual and organizational instruments. Yet considerable controversy remains over whether such agreements can bind the company and non-signatory shareholders, and over how they should be reconciled with the articles of association and shareholders' meeting resolutions. A systematic body of judicial rules has yet to emerge. Focusing on the 2023 revision of the Company Law of the People's Republic of China and on Article 12 of the Supreme People's Court's 2025 Draft Judicial Interpretation of the Company Law for Public Consultation, this article systematically examines the legal effect of shareholders' agreements by combining doctrinal and typological analysis from both contractual and organizational perspectives. First, it traces the legislative and judicial development of shareholders' agreements under Chinese company law, highlighting how the legislature's attitude has shifted from relative neglect in earlier amendments to substantive recognition in the 2023 revision. Second, it analyzes the rule structure established by Article 12 of the Draft Judicial Interpretation, under which shareholders' agreements do not, in principle, bind the company, yet may take effect against it in three exceptional circumstances. It further examines how the three pathways for such transformation of effect, namely unanimous written consent of all shareholders, explicit statutory authorization, and ratification by a company resolution, reflect an attempt to balance shareholder autonomy with corporate formalism. Finally, turning to the unresolved questions of the organizational effect of shareholders' agreements, their conflicts with the articles of association, and the coordination of their legal effect with shareholders' meeting resolutions, the article argues that typological rules should replace simplistic approaches based on blanket priority. It proposes a Chinese approach centered on a “transformation mechanism” that combines substantive and procedural legitimacy: the former activating directors' fiduciary duties and ensuring consistency with corporate interests, the latter ensuring the flow of information and preventing shareholder oppression. Such a mechanism may help reconcile the rigidity of organizational order with the value of contractual efficiency.