Yongin is a city in the Seoul Capital Area, the largest in Gyeonggi Province, South Korea. With a population over 1 million, the city has developed rapidly since the 21st century, recording the highest population growth of any city in the country. Yongin is a multi-nuclear city with multiple urban centers, not a single nuclear structure, and Giheung District crosses the Yeongdong Expressway and Dongbaek, while Suji District crosses Pungdeokcheon Stream and Jukjeon.