谢谢!
“When to Apply
The Embassy or Consulate General may process your H, L, O, P or Q visa application up to 90 days prior to the beginning of employment status as noted on your I-797. However, when making your travel plans, please note that due to Federal regulations, you can only use the visa to apply for entry to the United States starting ten days prior to the beginning of the approved status period noted on your I-797.”