Some questions about American immigrants

First of all, you can adjust your information through the local civil affairs bureau because you have just been refused a visa. I suggest you apply again after one year, because unless you can come up with strong materials within one year, there is still a great possibility of refusing the visa. However, it seems that the reason for your first refusal was not your birthday. You have to make it clear, otherwise it is easy to be rejected again. After all, the United States rejected you, so it will not be easy to do it again. You can also immigrate to the United States visa-free countries through immigrants from other countries, and then use this as a springboard to go to the United States.