Priceline Group has been watching China as a potential major market for its growing online travel agent (OTA) business. It makes sense, as China has a vastly growing middle class and an increased appetite for travel and booking travel services online. However, fierce local competition and trouble navigating the political landscape have made it hard for other internet companies to succeed in China. Here's what Priceline has done to learn the market and increase its investment in China for long-term growth. According to BCG analysts, average incomes in China rose 11% per year from 2010 to 2015, and those analysts expect this rise to lead to around 9% annual increase in consumer spending in the country through 2020. Even though China's overall GDP and economic growth are slowing, the middle class and their consumer spending are rising much faster than in most other regions of the world. That rising middle class, now with more disposable income, also has a growing appetite for travel. China's travel industry grew 19% in 2015 year over year and is set to be larger than the United States' travel market by 2020, according to Goldman Sachs analysts. Even better news for Priceline is that those travelers are increasingly booking online. In 2015, travel booked online grew 26% in China year over year. Get the full story at The Motley Fool