Four ports in east China's Shandong Province signed a strategic alliance with the largest port in South Korea, Busan.

Aiming to build a shipping and logistics center in northeast Asia, the alliance comprises Shandong's Qingdao Port, Yantai Port, Rizhao Port, Weihai Port and South Korea's Busan.

The five ports agreed they would mutually provide prompt and effective services for freight and passengers. They will also promote transit transport via the development of the Eurasian continental bridge and boost links between bonded areas in Shandong and the Busan Free Trade Zone.

The five ports will focus on the development of automobile freight transportation via sea and land, as well as the development of luxury cruises.