During the summer time, and especially on weekends, the area becomes a vertiable wall of humanity with more than 100,000 people packed in on a narrow, one mile strip of sand.
Haeundae-gu can be reached easily on the subway, Busan Subway Line 2, or by train on the Donghae Nambu railway line from outside of Busan. Both Haeundae subway and train stations are built adjacent to each other.
Haeundae is now an affluent, beach front community that attracts tens of thousands of Korean tourists and foreigners to what many consider to be Korea's best beach. It has been subject to considerable commercial development.
For more information visit: Haeundae Beach at Wikipedia
Imagine the beach in China! lol...