What are the precautions for applying for EB 1A immigration?

Letters of recommendation issued by experts or scholars in related professional fields will be favorable points for applicants when applying. Usually, the applicant's former professors, collaborators, employers or other people they know at industry conferences can come to issue letters of recommendation. Of course, you can also find some experts and scholars who are unfamiliar with the applicant but have prestige in the industry to write letters of recommendation. Any expert and scholar who has a better understanding of the applicant's work and field of work can issue a letter of recommendation for the applicant. The best advice is to find an authoritative person in the relevant field to write a letter of recommendation, which is more convincing.