What's the meaning of white plus line in folklore?

According to folklore, a hundred lines means finding a hundred families, and each family needs a line. One hundred lines is one hundred lines. This custom is very popular in most parts of China. In the old days, when Han people were nursing babies, they had to ask their neighbors and relatives for scattered rags and sew them into "patchwork" for their children to wear. It was said that there were hundreds of blessings, and children were less likely to suffer from illness and disaster and were easy to grow up.