深圳河
In 1898, the British sought to extend Hong Kong for defence. After negotiations began in April 1898, with the British Minister in Beijing, Sir Claude MacDonald, representing Britain, and diplomat Li Hongzhang leading the Chinese, the Second Convention of Peking was signed on 9 June. Since the foreign powers had agreed by the late 19th century that it was no longer permissible to acquire outright sovereignty over any parcel of Chinese territory, and in keeping with the other territorial cessions China made to Russia, Germany and France that same year, the extension of Hong Kong took the form of a 99-year lease. The lease consisted of the rest of Kowloon south of the Sham Chun River and 230 islands, which became known as the New Territories. The British formally took possession on 16 April 1899.