I don't know though. As an architecture student, one of my favorite books is a coffee tabler called "Architecture of Airports" and it has just rendering after rendering of ultra-modern Chinese airports. They're really making an effort to boost the country's international image. The gist of the bit about Chinese airports is that they're all getting redone to international standards over the next several years (ones like Shenyang, Shenzhen, Qingdao, and Xian are already done).
But, there's the whole thing about SEZs in China. The reason Guangzhou, Shenzhen, and Xiamen have seen a flurry of new airlines (though the latter not long hauls) is their initial status as SEZs. Now that other cities like Dalian, Qingdao, Chengdu, Nanjing, and Wuhan have started to peek out as some of the most prominent of the plethora of China's million+ cities, I would expect concentration there. China's got a bursting economy, but look at the figures. Large, disproportionate chunks are from Guangdong (Guangzhou and Shenzhen's province), Shanghai, Beijing, and (though it isn't included in official statistics) Hong Kong. Other wealthy provinces like Shandong, Zhejiang, and Fujian all have high GDPs, but it's most agricultural and manufacturing; the dinosaur legacy of the economy. PEK
, and CAN
have got the financial sectors in place and will demand the most intercontinental travel. The more domestic economical hubs like any large Chinese city will remain that: domestic hubs. But, it is China after all. The economy is quite robust and I'm sure other cities will get some more international importance.