Complex sentence: It is satellite city of Seoul and located approximately 21 km south of Seoul, and 19 km north of Suwon, and is connected to Seoul Subway Line 1 and Line 4.
Split into simpler sentences: It is satellite city around Seoul, located approximately 21 km south of Seoul and 19 km north of Suwon. The city is connected to Seoul Subway Line 1 and Line 4.