美国工作签证一年抽签几次？
H1B visa， also known as the “skilled worker” or “professional job” category is a non-immigrant work permit that can be obtained by foreign workers who have a bachelor’s degree and are working for companies in specialty occupations. This visa allows workers to enter into the US during their employment period， which may last up to 6 years (or less if your company hires you on an extended stay H1B Visa). The process of applying for this visa requires submitting both an online petition and an application with supporting documents through e-File system， similar to F1 student visas when they apply for their I-20 form. In general， all types of employers should be able to sponsor a new hire under H1B visa， except for some government agencies and educational institutions (see more about who does not need a Labor Certificate here)， provided there exists no shortage of jobs offered at comparable salaries for those positions within the same geographical area of the country where it applies. Generally speaking， each year， around 85，000 petitions will be accepted from employers across various industry sectors but only 65，000 available H1B Visas will be issued since USCIS only accepts Petitions filed after April 1st every year. As such；
The first 65，000 petitioners whose applications match the specific criteria listed above will be selected through lottery system to receive their approved H1B Visas; while the remaining applicants would receive notices of denial. However， because the number of petitions received far exceeds the cap established per year， most petitions submitted before April 1 of even one particular year gets denied due to lack of availability. For example， out of over 230 thousand applications submitted between May 2009 and March 2010（this was the start date of FY/Tax Year 2010）only 7000 were actually granted. So in order to increase chances for approval， many potential employees seek help from attorneys who specialize in preparing high quality applications containing detailed information regarding their qualifications， salary structure， education background etc， along with providing them useful tips on how best to prepare and submit these forms