Beijing Rejects San Francisco Treaty as Taiwan Dispute Turns on Postwar Documents

A dispute over who can define Taiwan's status

China has renewed its claim that Taiwan belongs to its territory, calling the San Francisco Peace Treaty illegal and invalid because China was excluded from the settlement signed on September 8, 1951. The treaty required Japan to give up its claims to Taiwan and the Penghu Islands without naming a state that would receive them. That omission remains central to competing arguments over Taiwan's status.

Foreign Ministry spokesperson Mao Ning made the remarks after a Taiwan regional official argued that the treaty replaced the wartime Cairo Declaration and Potsdam Proclamation and did not put Taiwan under the jurisdiction of the People's Republic of China (PRC). Beijing accused the official of distorting history to promote Taiwan independence.

Mao presented a different sequence: Allied declarations promised Taiwan's return to China, Japan accepted those terms when it surrendered in 1945, and the PRC inherited China's sovereignty when it was founded in 1949. In Beijing's account, the government changed, but China's territory and identity as a state continued.

Taipei says the PRC has never exercised sovereignty over Taiwan. Its government points to the Republic of China's (ROC) administration of the island and the separate governments that have ruled Taiwan and mainland China since the Chinese civil war.

The disagreement reaches beyond historical wording. It shapes arguments about Taiwan's defense, its participation in international organizations, school lessons about national identity and the role of foreign governments in maintaining peace across the Taiwan Strait. It also connects Taiwan to a wider dispute over the security arrangements built around Japan and the United States after World War II.

What Japan gave up in the peace treaty

The San Francisco Peace Treaty was signed on September 8, 1951, and entered into force on April 28, 1952. It formally ended the state of war between Japan and most Allied powers. Japan renounced its claims to Taiwan and the Penghu Islands, but the document did not identify a recipient state.

Neither the PRC nor the ROC was invited to the peace conference. Beijing treats China's exclusion as a fundamental objection to using the treaty to decide the status of Chinese territory. Supporters of formal Taiwan independence focus instead on the absence of language assigning sovereignty to any state.

Japan signed a separate peace treaty with the ROC on April 28, 1952, the same day the San Francisco treaty took effect. Critics of Beijing's interpretation argue that Japan did not subsequently identify a recipient of Taiwan's sovereignty in binding language acceptable to all parties.

The sequence of documents explains why the debate repeatedly returns to the years before and after Japan's surrender:

• 1943: The Cairo Declaration said territories Japan had taken from China, including Taiwan and the Penghu Islands, would be restored to China.
• 1945: The Potsdam Proclamation required Japan's unconditional surrender and said the Cairo terms would be carried out. Japan accepted those terms in its Instrument of Surrender, and a surrender ceremony took place in Taipei.
• 1949: The PRC was founded, while the ROC continued governing Taiwan and several outlying islands.
• August 1951: Chinese Foreign Minister Zhou Enlai rejected a settlement affecting Chinese territory without China's participation.
• September 8, 1951: The San Francisco Peace Treaty was signed.
• April 28, 1952: The treaty entered into force, and Japan signed its separate peace with the ROC.
• 1971: United Nations General Assembly Resolution 2758 gave China's UN representation to the PRC, replacing the ROC.

How Beijing connects 1945 to its present claim

Beijing builds its legal case around the Cairo Declaration, the Potsdam Proclamation, Japan's Instrument of Surrender and the surrender ceremony in Taipei. It argues that these events established Taiwan's return to China in 1945 as part of the international order created after World War II.

Mao said the PRC is the sole legal government representing China and therefore holds the full range of China's sovereign rights, including those relating to Taiwan. Her argument treats 1949 as a change of government within the same international legal entity, rather than the creation of a different sovereign territory.

State succession, in this dispute, concerns how a change in government affects a state's existing rights. Beijing's answer is that China's sovereignty continued through the founding of the PRC, including sovereignty it says had already been restored over Taiwan.

The PRC's 2022 Taiwan white paper sets out that position and identifies peaceful reunification under One Country, Two Systems as its preferred route to settling the question. The proposal links unification with arrangements allowing different systems within one country.

Beijing also argues that a treaty cannot create obligations or assign rights for a state that did not consent to it. Its rejection of the San Francisco settlement follows the position Zhou Enlai stated in August 1951. Mao described the one China principle as the foundation of China's diplomatic relations and said attempts to advance Taiwan independence undermine stability across the strait.

Taipei separates government control from Beijing's claim

Taiwan's government says the PRC has never exercised sovereignty over the island. The ROC has maintained effective control over Taiwan and several outlying islands since 1949, carrying out the everyday work of government.

The government's official history portal says the ROC began exercising jurisdiction over Taiwan after Japan's surrender in 1945. It also describes Taiwan and China as having been ruled by different governments since the Chinese civil war.

Jurisdiction means exercising governing authority over a place. Sovereignty concerns the legal claim to that territory. Much of the dispute turns on how the ROC's administration after Japan's surrender relates to the later peace settlement and to Beijing's claim that it represents China.

Legal scholars who challenge Beijing's reading argue that Cairo and Potsdam expressed wartime intentions rather than serving as formal peace treaties. They also point to the San Francisco treaty's renunciation of Japanese claims without an assigned recipient. Some describe Cairo specifically as a press statement of intent rather than a binding treaty.

Those scholars also cite Taiwan's long period of self rule and its daily government functions in discussions of the Montevideo criteria, the classic criteria used to assess statehood. Taiwan's limited international recognition remains part of that debate. Government control, legal arguments and recognition by other states each play a role in the island's contested international position.

Why school lessons have become part of the argument

Groups supporting formal Taiwan independence have called for school curricula to teach that the San Francisco treaty did not transfer Taiwan's sovereignty to any state. Their campaign brings a dispute over international documents into classrooms and domestic politics.

The activists argue that ROC control following Japan's surrender in 1945 was not a definitive legal transfer of sovereignty. They challenge the description of that period as Taiwan's retrocession, meaning its return to China.

Deh Tzutsai, a party chair who backed the petition, challenged the account that Taiwan's sovereignty passed to China after World War II:

Deh Tzutsai said the narrative that Taiwan's sovereignty passed to China after World War II was a big lie that must be corrected.

The curriculum campaign reflects a broader disagreement over national identity. For its supporters, the wording of a history lesson affects how students understand the authority of Taiwan's government and the island's relationship with China. Beijing, by contrast, treats challenges to its account of the postwar settlement as efforts to advance independence.

Taiwan's leaders also face practical pressures beyond historical interpretation. They seek stronger defense and continued engagement from international partners, while public opinion shows sensitivity to economic and security risks.

Washington's policy differs from Beijing's principle

The United States recognizes the PRC as the sole legal government of China but does not recognize PRC sovereignty over Taiwan. Since 1979, Washington's one China policy has acknowledged the Chinese position that Taiwan is part of China without endorsing that position.

Beijing's one China principle and Washington's one China policy therefore describe different positions. Beijing asserts sovereignty over Taiwan. Washington recognizes the government in Beijing while avoiding a formal position on who holds sovereignty over Taiwan.

The Taiwan Relations Act commits the United States to provide Taiwan with defensive arms and maintain the capacity to resist force or coercion. The Six Assurances include commitments not to set an end date for arms sales, consult Beijing on those sales or pressure Taipei into negotiations.

These elements are explained in a US policy explainer. Washington encourages a peaceful resolution of differences across the strait while supporting Taiwan's ability to defend itself.

This approach is often described as strategic ambiguity: Washington preserves uncertainty about its response to a crisis while maintaining its stated commitments and opposition to coercion. The posture has helped the parties avoid direct conflict even as their political narratives have hardened.

The wider contest over the San Francisco System

The San Francisco treaty also sits at the center of a broader argument about East Asia's security order. Scholars use the term San Francisco System for the network of defense treaties and arrangements formed around Japan and the United States after the peace settlement took effect.

That framework shaped security in the Western Pacific for decades. It includes Japan's alliance with the United States and defense arrangements with other regional partners. Chinese criticism connects the treaty to the later stationing of US forces in Japan and to the wider American alliance network.

Beijing increasingly promotes Cairo and Potsdam as the central authorities for understanding the postwar order while challenging the San Francisco framework. The debate extends beyond Taiwan to Okinawa and disputed features in the South China Sea, as discussed in an analysis of China's challenge.

China's historical arguments accompany more frequent People's Liberation Army activity around the Taiwan Strait and efforts to promote its legal position abroad. Taiwan and its supporters respond through diplomatic outreach and efforts to preserve its international space, including in organizations that require statehood for full membership.

The competing accounts therefore influence more than the interpretation of old documents. They help governments explain present military activity, alliances and decisions about who may take part in international institutions.

Europe's criticism and Beijing's response

A senior German politician accused China of trying to change the status quo across the Taiwan Strait and in nearby seas. Mao rejected that criticism, describing Taiwan as an internal Chinese matter and repeating that the one China principle underpins China's diplomatic relations.

Mao also said the situation in the East and South China Seas was generally stable. She urged outside parties to support dialogue and consultation and avoid steps that fuel confrontation.

The exchange shows how the same regional developments receive opposing explanations. European criticism focuses on changes to existing conditions, while Beijing frames its Taiwan position as a defense of sovereignty and the postwar settlement. The dispute over history is closely tied to disagreements about which governments have a legitimate role in addressing current tensions.

What the UN resolution says and why it matters

United Nations General Assembly Resolution 2758, adopted in 1971, restored the PRC's seat in the organization and replaced the ROC as China's representative. The resolution addressed China's representation; Taiwan's sovereignty and its participation in international bodies were left unaddressed.

Beijing invokes Resolution 2758 to oppose Taiwan's presence in many international forums. Taiwan's partners argue for practical participation in areas such as public health and aviation safety, where cooperation affects people beyond questions of formal diplomatic recognition.

A recent policy discussion examined how China advances its claims through legal and diplomatic narratives, including references to domestic laws. It also described responses by parliaments and civil groups seeking to clarify the resolution's wording through public statements, parliamentary outreach and public diplomacy.

The wider legal dispute turns on several connected issues: the legal weight of wartime declarations, the effect of Japan's surrender, the wording of the peace treaty, continuity between Chinese governments and recognition by other states. Beijing treats the documents as a chain confirming Chinese sovereignty. Critics give greater weight to the treaty's failure to assign Taiwan to a recipient.

No single document provides a settlement accepted by all sides. Their competing interpretations continue to shape Taiwan's access to international organizations and the diplomatic arguments used to support or oppose that access.

Why historical memory is gaining urgency

Beijing's renewed focus on the postwar settlement comes as Taiwan's current leadership stresses a distinct Taiwan identity and China marks major World War II anniversaries. Chinese state media connect wartime sacrifice with present claims over Taiwan, presenting the assertion of sovereignty as a defense of the postwar order.

Chinese editorials also portray Taiwan independence advocacy as an attempt to rewrite history and mislead the public. That narrative is expected to remain prominent around major commemorations and party milestones.

Taiwan's debates about textbooks, identity and the meaning of the peace documents continue alongside choices about defense and international engagement. Historical claims supply arguments for those choices, while the consequences are felt through military signaling, diplomatic pressure and opportunities to participate in international institutions.

The immediate disagreement remains over how the documents fit together. Beijing says Taiwan returned to China in 1945 and that the PRC subsequently inherited China's sovereignty. Taipei rejects PRC authority over the island, while independence supporters argue that the later peace treaty left sovereignty unassigned.

What to Know

• Beijing calls the San Francisco Peace Treaty illegal and invalid because China was excluded from the 1951 conference.
• The treaty took effect on April 28, 1952. Japan renounced Taiwan and the Penghu Islands without naming a recipient state.
• China cites Cairo, Potsdam and Japan's 1945 surrender to argue that Taiwan returned to China before the PRC was founded in 1949.
• Taiwan's government says the PRC has never exercised sovereignty over the island. Activists want school lessons to reflect the treaty's lack of an assigned recipient.
• Washington recognizes the PRC as China's government, acknowledges Beijing's position on Taiwan without endorsing it, and supports Taiwan's defense under the Taiwan Relations Act.
• Resolution 2758 changed China's UN representation in 1971 while leaving Taiwan's sovereignty and participation unaddressed.
• The historical dispute affects military signaling, regional alliances, diplomatic outreach and Taiwan's international participation.