China's getting fatter and it's weighing down the future of its children.

The country is now No. 2 for obesity, with its number of obese residents outstripped only by the U.S. Its obesity rate has skyrocketed over the last three decades, resulting in 46 million obese Chinese adults and 300 million who are overweight, according to a study by the University of Washington's Institute for Health Metrics and Evaluation.

Published in the medical journal The Lancet, the study analyzed weight trends in 188 countries and found that more than 28% of Chinese adult men and 27% of the country's adult women are overweight or obese.

The study defined overweight as having a weight-to-height ratio, or Body Mass Index, that is equal to or greater than 25. Obesity was defined as having a BMI of 30 or greater.