Batam, a transportation hub of Indonesia, became a friendship city of Shenzhen on December 18, 2006.
Frankfurt, an economic center of Germany, became a friendship city of Shenzhen on September 12, 2006.
Turin, an economic and cultural center of Italy, became a friendship city of Shenzhen on September 18, 2006.
Busan, the second largest city of Korea, became a friendship city of Shenzhen on September 24, 2006.
Mindelo, a transportation hub of Cape Verde, became a friendship city of Shenzhen in January 2008.
Belgrade, the capital and economic center of Serbia, became a friendship city of Shenzhen on June 12, 2009.