Lu Zhihao, a four-year-old boy who weights over 60 kg, is already five times the size of a normal child his age. When Lu Zhihao was born, he weighed just 2.6 kg. However, from the time he was three months old, he began to gain weight rapidly. His parents took him to three hospitals and one of them said he has a tumor in the head, while the other two said there is no tumour in the head. [Photo: CFP/Zhou Tian]