Ten-month-old Lei Lei, also known as the “Michelin baby“, has become somewhat of an Internet celebrity after photos of him were published on a Chinese government site.

The young boy had scientists scratching their heads, when he was brought to the hospital, earlier this month, on account of a fever. At just ten months, he weighs a whopping 20 kilograms, about the average weight of a normal six year-old. He is currently in a hospital, undergoing some tests that will hopefully reveal some hints about his abnormal size and weight.

Lel Lei’s parents say the boy has quite an appetite, and that he spends most of his days juts breast-feeding and sleeping. He also instinctively puts everything he touches into his mouth, and tries to munch on it.

The Michelin Baby is just the tip of the iceberg, as the obesity problem because more and more serious in China. As the country’s economy keeps growing, millions of people are becoming sedentary and developing weight problems. Over 60 million Chinese are obese, and over 200 million are overweight.