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How did Sweden establish diplomatic relations with South Korea and India?

India is a developing country in South Asia with a population of over 654.38+0.2 billion. Sweden is a rich country in northern Europe, with a high level of development and a population of only a few million. Thousands of kilometers apart, the two countries are in sharp contrast in all aspects. Political relations are ordinary diplomatic relations at the ambassadorial level, and there is no special connection in other aspects.