What should I do if my American immigrant visa is rejected and I need a paternity test?

American laboratories certified by American Blood Bank Association (AABB) must be selected for identification. Other laboratories are not qualified to do this kind of appraisal, and they will not be accepted by the US Embassy. Generally speaking, the laboratory you choose will send you the sampling package and send it to the American embassy, and then the embassy will inform you to take samples. Your relatives in the United States can take samples in the United States. Then, the samples were tested in laboratories in the United States, and the results were directly sent back to the embassy by some laboratories. The total time is about 2 months, mainly because the embassy has a long time to inform you. You can contact or call this number 020-3884-705 1. This is a large-scale laboratory specializing in paternity testing of immigrants in the United States, called General Genetics. They also have offices in Guangzhou.