Visa and passport to the United States

Bring your passport and household registration book, ID card and photos to the public security bureau where your household registration is located. If you have a visa, you can take a personal tour. If the son of your father's colleague can send you an invitation letter, you can also apply for a visa to visit relatives and friends.

Under normal circumstances, it is not difficult to sign as long as you have sufficient economic proof, sufficient materials and no immigration tendency. For the sake of your signing rate, I suggest you find a travel agency. They are more professional. But they will charge a certain service fee.