Current visa, code-named the most is the United States, which are code-named non-immigrant visa as many as 18 species, each subdivided into a number of categories. Profile are as follows:

(1) A visa category (that is, diplomatic official visas) and the issue of targets are as follows:

A-1: foreign ambassadors accredited to the United States Government, Minister, career diplomats, consular officials and their family members;

A-2: other foreign government officials, employees and their families;

A-3: A-1 and A-2 visa category winners of the entourage, servants, private employees and their family members.

(2) B visa category (that is, business travel visas) and the issue of targets are as follows:

B-1: business to trade, study visits, and other related services for the purpose of dealing with the short-term stay;

B-2: short-term visiting relatives and friends, tourists.

(3) C visa category (that is, transit visas) and the issue of targets are as follows:

C-1: the transit of foreigners;

C-2: transit to the United Nations Headquarters in New York foreigners;

C-3: transit of foreign government officials, the entourage, servants, private employees and their families.

(4) D visa category (that is, crew members, seafarers visa) and the issue of targets for:

States on international flights and crew members on board * seafarers.

D-1 crew members or flight (with the original board the vessel or aircraft departure *);

D-2 flight crew members or staff (not the original board the vessel or aircraft departure *);

(5) E visa category (that is, international treaties or agreements investor visas) and the issue of targets are as follows:

E-1: According to international treaties or agreements in the U.S. business and their spouses and children;

E-2: According to international treaties or agreements in the U.S. investors and their spouses and children.

(6) F visa category (student visa) and the issue of targets are as follows:

F-1: study (that is, studying abroad at their own expense);

F-2: F-1 visa winners of the spouses and children.

(7) G visa category (that is, employees of international organizations visa) and the issue of targets are as follows:

G-1: Government recognition of a foreign government organized an international presence, chief Permanent Representative, on behalf of the subordinate staff and the staff members of the family;

G-2: Government does not recognize the foreign government representatives of international agencies and their families;

G-3: Government has not recognized by the international foreign government agencies and representatives of organizations of families of members of international agencies or non-members of foreign government representatives and their families;

G-4: International agencies officials, employees and their families;

G-5: G-1, G-2, G-3, G-4 of the servants, private employment staff and their families;

H-1 with outstanding achievements and capabilities of the temporary staff;

H-1 H-1B professional visa to work

H-2A agricultural labor to provide short-term staff;

H-2B non-agricultural labor to provide short-term staff;

H-3 trainees;

H-4 H-1, H-2, H-3 to the families;

I NEWS staff, their spouses and unmarried children under the age of 21;

J-1 exchange visitor;

J-2 J-1's spouse and unmarried children under the age of 21;

K-1 fiance citizens of the United States (his wife);

K-2 American citizen fiance (his wife) under the age of 21-year-old unmarried children;

L-1 company by the deployment of international staff;

L-2 L-1 and the family members under the age of 21 unmarried children;

M-1 vocational school students;

M-2 M-1 to the spouse under the age of 21 and unmarried children;

N special immigrant spouses, persons under the age of 21 unmarried children;

O in science, arts, education, business, sports have special achievements, to the United States continue to pursue their work, their spouses, persons under the age of 21 unmarried children can peer;

P activists, artists, performing arts groups in the United States exchanged under the scheme, the spouse, under the age of 21 unmarried children can peer;

Q international cultural exchanges;

R clergy;

NATO-1 to NATO-7 in the North Atlantic Treaty of foreigners in the United States and the relevant staff.