(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.
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.
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Wen, 18, touches the pregnant belly of his 13-year-old wife Jie. They live together in Tangzibian village, Mengla county in Yunnan.
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.
Jie touches her 6-month pregnant belly at her home.
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.
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.
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.
Ming holds a breast pump as he watches his wife, Cai, and his mother care for his newborn son.
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."
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.
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.
Jian, 17, listens to his wife Mei's pregnant belly at their home, in Wenge village, Mengla county.
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.
Right now Hong Hong is too young to undergo surgery, the infant's father, Zou Chenglin, told CNN. In the meantime, his parents are seeking medical advice on how to treat their son.
The mother shows her son's hands. He has 15 fingers, two palms on each hand and no thumbs.
Doctors have given the family differing advice, with some saying the surgery is much more complicated than originally thought because Hong Hong requires not only the removal of his extra fingers and toes but also needs reconstructed thumbs. Opposable thumbs are essential because they give people the ability to grasp objects.
The surgery could cost as much as 200,000 Chinese yuan (about $30,000), the boy's father said. The couple has turned to the Internet for help, and so far they've raised more than 40,000 yuan (more than $6,000) through online donations.
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Hai Cong was born in Guangxi province in southern China in 2009. He started living in Alenah's Home, run by Children's Hope, in July, 2014. Hai Cong suffers from atresia aural -- the absence or closure of the external ear canal -- and uses hearing aids. His carers say he's "an energetic boy who is curious about everything around him."
Born in 2009, Ke Yuan has been in care since March, 2015. He also suffers from aural atresia and is unable to hear. Children's Hope says he's a thoughtful boy who helps take care of the younger children. "Although he is shy when meeting strangers, he will be willing to talk once he gets familiar with them. Now, taking the initiative to learn to speak more words, Yuan has made huge progress."
Born in 2011, Yuan Kai has been cared by Children's Hope since May, 2015. He is deaf and mute. His carers say he's "very handsome but a little bit naughty." Yuan Kai is currently registered at a local kindergarten.
Born in 2009, Hui Hui has cerebral palsy. Her carers at Children's Hope say she used to have difficulty eating but with "the help of nanny's eating guide and rehabilitation training, Hui Hui gradually started to eat porridge and fruit." Now, she can feed herself. "Hui Hui is really cute and everyone likes the girl when they see her," her carers say.
Meng Song was one of the little girls looking for a new home at the orphanage last time CNN visited in August, 2015. She's since been adopted.
Yi Tan was born in 2012 with congenital heart disease and Down's syndrome. Since CNN's last visit to the orphanage in August, she's found a new home.
Guang Quan is another resident of Alenah's Home. His new family is in the process of completing the paper work needed to adopt him.
Da Long was born in 2010 and is deaf and mute. He's found new parents since CNN last visited in August.
But they've decided to halt the crowdfunding efforts because of the mixed comments they've received about raising money online, the father said.
For now, the family plans to head back to the city of Shenzhen, where they live, so that the father can go back to work.
CNN's Zahra Ullah contributed to this report.