You need a major seaport, a naval presence or an industrial hub. Sure thing, go to Qingdao in China and go to San Diego in the US. These two share a number of similarities. You want some other similarities, look at the Marine research going on. In addition, while San Diego is already a tourism hub in the US, Qingdao is in the process of developing a large tourism community. One major difference is the huge bio-tech presence in San Diego (currently the 2nd largest in the US).
- Population - 4 million
- Location - Sitting in the Shandong Peninsula, looking out at the Yellow Sea.
- Fun Fact - Qingdao is perhaps best known to Westerners by its large brewery, Tsingtao Brewery.
- Population - 1.4 million
- Location - In Southern California adjacent to the Mexico border.
- Fun Fact - The San Diego Zoo played home to the first Giant Panda birth in the Western Hemisphere since 1990.