The American visa is marked with blue stripes. Why is it rejected?

American visas are marked with blue stripes, and the reasons for refusal are:

Getting the blue bar doesn't mean that you have passed the visa, which means that there is no problem with your visa materials and you have been allowed to enter the embassy for final review. Doesn't mean that your visa has been issued to you.

An American visa is an annotation and seal on the passport or other travel documents held by American or foreign citizens, which is used to indicate the procedures for allowing them to enter or leave the United States or pass through the country. It can also be said that it is an endorsement certificate issued to them. American visas can be divided into two categories: immigrant visas and non-immigrant visas; Each big category can be divided into many small categories.