What was Korea's response to outsiders during trade?

Korea historically adopted a cautious and selective approach to trade with outsiders, often prioritizing its sovereignty and cultural identity. During the Joseon Dynasty, for instance, Korea implemented strict policies to limit foreign influence, including the "Sadae" policy, which emphasized tributary relations with China while restricting trade with Western nations. This isolationist stance continued until the late 19th century when increased pressure from foreign powers ultimately forced Korea to open its markets, leading to significant socio-political changes.