Wahaha is the largest drink company in China. Here's an interesting interview with the CEO:

"Later, people started to question the quality of those medicines, especially if they contained hormones. Meanwhile, I found that Chinese children -- who usually don't have any siblings due to the single-child policy -- are too picky about their food. I wanted to develop a kind of oral medicine that could help stimulate their appetite. We invited a professor to do the research and development, and asked experts from around the country to offer advice. At that time, there was no health product specifically aimed at this market, even though China had more than 300 million children. I felt the potential was huge. It turns out that our strategy of focusing our products on children was right."