(Sanqin.com/Chen Feibo)

A woman surnamed He has been looking for her son for 28 years. She says that she will keep looking until she is physically unable.

Jia Bo, He's son, was born in 1984 and went missing at the age of 4 in Shanyang county, Shangluo, a city in northwest China's Shaanxi province. The boy was discovered to be missing in the afternoon of May 23, 1988.

"The day that Jia went missing was also the day of our county's agricultural materials exchange fair. My husband picked Jia up from kindergarten, dropped him off at the gate of our residential community, and left for work," He recalled. She said her son was able to walk back home independently from the gate.

However, He has not seen her son since that day. It has never been determined whether the boy was kidnapped or wandered off by himself.

He’s search for her son began from that day. As a shop assistant in a shopping mall, He used all her vacation time to go out looking for her son. She also retired early in order to spend more time searching for him.

He’s second son was born in 1991. However, He and her husband have never been able to fully overcome the trauma of losing their first son. The couple prepares a meal and sets out chopsticks for their lost child on every Spring Festival eve.

He has now been looking for her son for 28 years. Any time she receives a clue, she goes out to search for weeks or months at a time. He stays in the cheapest hotels. She sometimes even sleeps on the street to make the most of her time.

In the past 28 years, He has been to more than 20 provinces and cities including Jiangsu, Hefei, Sichuan, Guangdong, Henan, Hebei, Chongqing, Shanxi, Hunan, Guangxi and Shandong. He distributes fliers to passers-by in downtown areas and always leaves her contact information. She said there is a red birthmark about the size of a corn nut near her son's wrist. She hopes that anyone with relevant information will contact her at +86 18991476918 or +86 18991476928.