The document discusses sustainable city development in Busan, South Korea. It outlines several key points:
1) The u-City Busan project aims to create a new growth engine and improve quality of life through innovations in urban technology. 
2) 28 projects have been initiated across areas like infrastructure, public services, and disaster prevention. Total investment is $74 million from government, city, and private sources. 
3) A proposed "Green u-City" project would transform 50 square kilometers to be more sustainable and knowledge-based, with a budget of $500 million across sectors like transportation, energy, and logistics. 
4) Barriers to investment include competing projects, short-term contracts