Is targeting the Chinese app market something every developer should be looking at? If you think so, you need a plan. Developing and marketing an app targeted at China usually requires more than just localizing. You have to consider customer service, marketing, and the needs of an entirely new culture.
One place where localization works best is a simple app, such as a utility. Read about how Yoink, a great Mac app I use every day, localized and substantially increased their sales in Japan & China. It would be interesting to see how Matthias is handling support for those countries.
FYI: According to Tech Crunch, China has overtaken the US in App Store Revenue.
Yoink’s Revenue a Month After Localizing by Matthias Gansrigler