Final answer:
The Treaty of Nanjing, signed in 1842, had a significant impact on China and marked the end of the First Opium War. It opened ports to European trade, ceded Hong Kong to Britain, and imposed a large indemnity on China.
Step-by-step explanation:
The Treaty of Nanjing, also known as the Treaty of Nanking, was a significant event in the history of China. Signed in 1842, this treaty marked the end of the First Opium War between China and Britain. It had a number of important consequences, including opening five Chinese ports to European trade, ceding Hong Kong to Britain, granting most favored nation status to Britain, and imposing a large indemnity on China.