Sino-British relations refer to the diplomatic and economic interactions between the People's Republic of China and the United Kingdom. These relations have evolved significantly since the 19th century, particularly after the Opium Wars, which led to the signing of treaties that favored British trade interests in China. In recent years, Sino-British relations have been influenced by issues such as trade, investment, and human rights. The handover of Hong Kong in 1997 marked a significant turning point, establishing a "one country, two systems" framework that continues to shape interactions between the two nations today.