You qualify for an L-1A/B visa if you have been employed outside the U.S. for at least on continuous year out of the past three years, and you are transferred to the U.S. to work as a manager, an executive, or a specialized-knowledge worker. Your spouse and minor children could get L-2 visa accompanying you.
H-1B & H-4 Visa
H-1B temporary visas are made available to workers in occupations requiring highly specialized knowledge and to distinguished fashion models. There are “cap” H-1B petitions which is subject to 85,000 quota limit and “non-cap” H-1B visa petitions which can be approved for persons who will work for an institution of higher education , a nonprofit research organization, or a government research organization. H-4 visa is for the spouse and minor children of H-1B visa holder.
H-1B & H-4 工作签证/家属
H-1B临时工作签证是颁发给有高度专业知识的人才以及顶级时尚模特的签证。分为需 要抽签和不需要抽签的类型。需要抽签的申请每年有85000个名额，不需要抽签的适 用于给高等教育机构、非营利机构或者政府研究机构的工作人员。H-4 签证是H-1B工 作签证持有者的配偶和21岁以下小孩可以申请随行的签证。
O-1 visas are available to persons of proven extraordinary ability in the sciences, arts, education, business, or athletics. To be considered a person of extraordinary ability, you must have sustained national or international acclaim in your field, or, if you work in motion pictures or television productions, you must have a demonstrated record of extraordinary achievement.
O-1签证是颁发给在科学、艺术、教育、商业或者体育领域有非凡能力的人的签证。对 于非凡能力的要求，申请人必须证明在自己的领域里享有国家级或国际级盛誉。或者 ，如果你在动画或者电视制作领域工作，你必须要证明自己票房的非凡成功。
E-2 Investor Visa
E-2 visa is the visa version of EB-5 green card. An E-2 visa allows businesspeople from certain countries to work in the U.S. for a business in which people from their country have invested. There are no limits on the number of E-2 visas that can be issued each year. Also, it can be extended for unlimited times.
E-2投资者签证是EB-5 投资移民的签证版，它不是绿卡。 E-2投资者签证可以使双边贸 易条约国的公民来美国投资生意并且在美国合法工作生活。E-2投资者签证没有名额的 限制，并且可以无限次申请延期。
If you intend to marry a U.S. citizen, your fiancé may bring you to the U.S. for the wedding, with a K-1 visa. Although it is a nonimmigrant visa---lasting for only 90 days and cannot be renewed---you are very close to being able to apply for a green card after you’ve obtained a K-1 visa.
未婚妻/夫签证适用于想要与美国公民结婚并且要到美国举行婚礼的人。虽然这种签证 是一种短期的非移民签证，有效期只有90天并且不能延期，但在你拿到未婚妻/夫签证 之后其实已经离申请婚姻绿卡不远了。
The U visa is a United States nonimmigrant visa which is set aside for victims of crimes (and their immediate family members) who have suffered substantial mental or physical abuse while in the U.S. and who are willing to assist law enforcement and government officials in the investigation or prosecution of the criminal activity. It permits such victims to enter or remain in the US when they might not otherwise be able to do so.
U Visa 受害者签证
U签证是美国非移民签证，专为在美国遭受严重精神或身体虐待的并愿意协助执法和 政府官员进行调查或起诉犯罪活动的犯罪受害者（及其直系亲属）设置。它允许这些 可能本没有其它途径进入美国的受害者进入或留在美国.
A T visa is a type of visa allowing certain victims of human trafficking and immediate family members to remain and work temporarily in the United States, typically if they report the crime to law enforcement, and agree to help them in the investigation and/or prosecution of the crime (or crimes) committed against them. It also allows close family members of the victims to come to the United States legally.
T Visa 人口贩卖被害者签证
T签证是一种允许某些人口贩运受害者和其直系亲属在美国暂时留下和工作的签证，通 常是他们向执法部门报告犯罪，并同意帮助警察调查和/或起诉对他们犯下的罪行。 它还允许受害者的近亲属合法地来到美国。
Some exchange visitors with J-1 visas are subject to a two-year home-country physical presence requirement. It requires you to return home for at least two years after your exchange visitor program. This requirement is part of the U.S. law, in the Immigration and Nationality Act, Section 212(e). If you cannot return home for two years, you must apply fora waiver. The Department of Homeland Security must approve your waiver before you can change status in the United States or receive a visa in certain categories.
J-1 签证是美国政府发给外国人来美学习、进修或从事研究工作等的签证种类之一。美 国政府规定，凡持 J-1 签证来美的人员，在美停留期满后必须返回原所在国居住两年 。由于某些原因在美停留期限需超过签证规定时间的人员，应向美国政府提出免除返 回原所在国居住两年限制的豁免申请，但首先须得到原所在国政府的批准。