Final answer:
The Treaties of Nanking and Tientsin provided extraterritorial privileges to British citizens in China, resulting in 90 foreign settlements by 1900.
Step-by-step explanation:
The Treaties of Nanking and Tientsin granted most-favored nation status and extraterritorial privileges to the British citizens, granting them immunity from dynastic law in China. Following a period of military conflict and Western pressure during the Opium Wars, these unequal treaties led to the opening of multiple Chinese ports to foreign trade and establishment of foreign settlements, with terms heavily favoring European powers. By the breakout of the Boxer Rebellion in 1900, there were 90 such foreign settlements or 'concessions' in China that catered to over 300,000 European and American traders, diplomats, and missionaries.
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