What is the relationship between the Iraqis and the four Lujia brothers?

More than 30 years ago, four brothers' fathers were not married, and she fell ill. At that time, Iraqis had just graduated from nursing school. Shi Guang's father fell in love with him at first sight, but Iraqis refused. Shi Guang's father forced Iraqis to get pregnant, and then he took Shi Guang, who was seven months old, to the United States. Married the mothers of Shiyu, Shijie and Shi Heng, when the Iraqis had just given birth to a child and were hiding in the countryside. After that, she went back to Seoul to look for children. It was not until Shi Jie came to work that she really found the first light.