After two years he lost 20 kilograms.
"Intestinal bacteria play an indispensable role in the genesis and development of chronic diseases, such as obesity, diabetes and coronary heart disease. The study will help find how bacteria affect us," Zhao said.
According to the Ministry of Health, China has 120 million people classified as obese.
"Chinese obesity is catching up with Western countries," Qu Shen, an obesity expert from Shanghai No 10 People's Hospital said.
"There are many reasons for obesity, such as lack of physical activity, increased calorie intake, genes, environment and intestinal bacteria," Qu said.
"The new research provides a direction to fight obesity," he said.
Sex case leads to warnings about apps on smartphones