The Treaty of Nanjing: From Signing on the Yangtze to Opening the Ports

In summer 1842, the First Opium War reached the lower Yangtze. British forces occupied Zhenjiang, threatened canal transport, and advanced toward Nanjing. The Qing government sought peace under military pressure, while Britain demanded indemnities, territory, and expanded trade access. This imbalance is essential to understanding the treaty's conditions; its language of peace and friendship does not imply equal circumstances.

Qiying, Yilibu, and Liangjiang Governor-General Niu Jian negotiated for the Qing, with Henry Pottinger as British plenipotentiary. In late August, the parties met at Jinghai Temple in Nanjing, leaving tariff details, residence sites, and other questions for further discussion. On August 29, they signed the thirteen-article treaty aboard HMS Cornwallis, anchored off Nanjing on the Yangtze. The negotiating venue, signing location, and later site of ratification exchange belonged to different stages.

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Article II permitted British merchants and their families to reside and trade in Guangzhou, Xiamen, Fuzhou, Ningbo, and Shanghai, with British consuls and other officials communicating with Chinese local authorities and handling related commercial matters. The list established the new geographical scope of trade, but actual arrangements for trading houses, residences, and intercourse remained subject to subsequent negotiations.

Article III ceded Hong Kong Island to Britain for British administration. It referred specifically to the island; later arrangements concerning Kowloon and the New Territories must not be read into the 1842 document. Article V removed the restriction requiring British merchants to trade only through licensed hong merchants, allowing them to choose trading partners. This altered Guangzhou's existing foreign-trade administration, rather than abolishing every Chinese commercial institution on the same day.

Articles VIII and IX also required the release of detained British subjects and an amnesty for Chinese people prosecuted for residence, trade, or service connected with the British. The treaty therefore addressed not only goods and ports but also individuals' status, detention, and liability after the war.

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Articles IV–VII specified indemnities totaling twenty-one million silver dollars: six million for confiscated opium, three million for debts owed to British merchants by bankrupt hong merchants, and twelve million for British war expenses. Silver dollars and silver taels were different units; the total must not be restated as twenty-one million taels. Ransoms collected by British forces from Chinese cities after August 1, 1841, were to be deducted from the war-expense portion.

The payment schedule required six million immediately, six million in 1843, five million in 1844, and four million in 1845, with each of the last three years' sums divided into two installments. Overdue amounts carried annual interest of five percent. These were prescribed obligations and deadlines; the provisions alone do not establish that every actual payment arrived on time.

Article XII linked withdrawal from Nanjing, the canal, and Zhenhai to receipt of the Chinese emperor's assent and payment of the first installment. Gulangyu and Zhoushan would remain occupied until payment and port-opening arrangements were completed. Different posts had different withdrawal conditions; signature did not require British forces to leave all occupied territory simultaneously.

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Recognizing the distance between the countries, Article XIII required sovereign ratifications to be exchanged as soon as possible. Before that exchange, the plenipotentiaries would exchange signed and sealed texts, and the provisions were to take effect. Implementation after signature, sovereign ratification, and exchange of instruments were therefore connected but distinct stages. The exchange in 1843 should not be taken to mean that all provisions had been ineffective beforehand.

The Daoguang Emperor's ratification reproduced in Martin's 1847 report bears the twenty-fourth day of the ninth month of his twenty-second year, corresponding to October 27, 1842. Queen Victoria's instrument is dated December 28, 1842, at Windsor Castle. The parties exchanged ratifications in Hong Kong on June 26, 1843, and signed a declaration on transit duties that same day, expressly making the supplementary declaration a condition of the exchange.

Article X required an import and export tariff to be established and published but left the precise rate of inland transit duties unspecified. The June 26 declaration acknowledged the omission and imposed a ceiling based on then-existing rates. Tariff rates subsequently negotiated cannot all be treated as having been written into the treaty signed at Nanjing.

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Wu Qiandui's study of Shanghai shows that Pottinger, Balfour, and others were already inspecting the area and discussing commerce and residence in October 1842, before Shanghai opened as a treaty port in November 1843. Later British recollections of cooperation in selecting land did not entirely agree with Qiying's memorials about local officials opposing arbitrary enclosure. Obtaining trading rights did not settle the disputed extent of residence areas.

The Treaty of the Bogue, signed on October 8, 1843, further provided that Chinese local officials and British consuls should arrange house and land rental according to local circumstances. Rents were to be fair, with neither extortion by Chinese residents nor forced rental by British merchants. Article VIII extended to Britain relevant additional privileges China might later grant other countries. Residence arrangements and this most-favored-nation clause had their own supplementary texts and should not be confused with original details in the thirteen articles of the Treaty of Nanjing.

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Withdrawal likewise continued through later negotiations. The agreement of April 4, 1846, on returning Zhoushan stipulated its restoration to China after imperial approval and required China not subsequently to transfer Zhoushan or related islands to another state. It also deferred British entry into Guangzhou until local circumstances permitted. Returning occupied territory and access within the city thus required further conditions; promises of restoration should themselves be checked separately against records of actual handover.

The Treaty of Nanjing concluded the war's peace-negotiating phase and reshaped Anglo-Chinese relations through island cession, indemnities, and changes in trade restrictions. Its historical effects lay both in clearly stated rights and duties and in tariff, residence, and withdrawal procedures left for further negotiation. Reading the treaty, ratification instruments, and later articles in sequence reveals how a peace agreement was gradually implemented and which conflicts it could not resolve immediately.

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