Story highlights Infant has polydactylism, a condition in which people have extra fingers, toes

The boy's parents are trying to raise enough money for a life-changing surgery

(CNN) Meet Hong Hong. He's almost 4 months old, lives in China and has 31 fingers and toes.

That's not a typo. The boy was born in January with 15 fingers and 16 toes in Pingjiang County in Hunan province. He also has two palms on each hand and no thumbs.

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Doctors diagnosed Hong Hong with polydactylism, a congenital condition that happens in humans, dogs and cats, giving them extra fingers and toes. Polydactyly is a pretty common condition, affecting about one in every 1,000 live births, according to Children's Healthcare of Atlanta . Often, the extra digits are removed surgically. Hong Hong's parents are trying to raise enough money so their son can undergo the life-changing operation.

Photos: Married young: Meet China's teen brides Photos: Married young: Meet China's teen brides Wen, 18, touches the pregnant belly of his 13-year-old wife Jie. They live together in Tangzibian village, Mengla county in Yunnan. Hide Caption 1 of 11 Photos: Married young: Meet China's teen brides Jie (shadow) looks at her wedding photo at home. Jie quit school after she got married but says she feels bored staying home to farm, cook and embroider. Hide Caption 2 of 11 Photos: Married young: Meet China's teen brides Jie touches her 6-month pregnant belly at her home. Hide Caption 3 of 11 Photos: Married young: Meet China's teen brides Cai, 16, holds her 2-month-old son at her village home in Mengla county. A year before this photo was taken she married and dropped out of school. Hide Caption 4 of 11 Photos: Married young: Meet China's teen brides Cai and her husband Ming use a neighbor's hand mill to grind corn. Ming says he misses his single life because he could hang out a lot with his friends before, but now his friends won't take him out because they are afraid that Cai will disapprove. Hide Caption 5 of 11 Photos: Married young: Meet China's teen brides Ming and his wife, Cai, looks on as Ming's mother puts her grandson's mouth on her breast in an attempt to calm the child down. Ming's mother helps the young couple by taking care of the baby most of the time. Hide Caption 6 of 11 Photos: Married young: Meet China's teen brides Ming holds a breast pump as he watches his wife, Cai, and his mother care for his newborn son. Hide Caption 7 of 11 Photos: Married young: Meet China's teen brides Many of the young couples meet at school. This love letter kept inside a physics textbook reads: "Hi, do you have a boyfriend? Can you accept me? I like you, please accept me. Reply." Hide Caption 8 of 11 Photos: Married young: Meet China's teen brides Mei, 16, sits on bed with her 2-year-old daughter and 1-year-old son in Wanhe village, Mengla county, Yunnan province. She has been married for 2 years. She and her husband were classmates in primary school and they dropped out from school after getting married. Hide Caption 9 of 11 Photos: Married young: Meet China's teen brides Xiao Rong, 16, (left) looks on as her 20-year-old husband Xiao Yong holds their 10-month-old baby, in Mengla county, Yunnan province. Hide Caption 10 of 11 Photos: Married young: Meet China's teen brides Jian, 17, listens to his wife Mei's pregnant belly at their home, in Wenge village, Mengla county. Hide Caption 11 of 11

The condition is usually passed down in families, which is the case for Hong Hong.

The boy's mother also has polydactylism, with six fingers and toes. While she was pregnant with Hong Hong, both parents were worried their child would inherit the condition.

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