H1b面签加急

现在北京，上海，广州能预约的都是在3个星期之后了。有谁用过加急的么？用这种business的机会大么？如果公司不给办理不知道个人原因例如照顾小孩有机会么？加急后check的机会大么？我是同一家公司renew visa。


Purpose of travel is to attend an urgent business matter where the travel requirement could not be predicted in advance.
Essential documentation:

• A letter of invitation from the corresponding company in the United States attesting to the urgency of the planned visit, describing the nature of the business and that either the U.S. or local company will suffer a significant loss of opportunity if an expedited appointment or drop-off service is not available.

or

• Evidence of a necessary training program in the United States of three months duration or less, to include letters from both the local employer and the U.S. company providing the training. Both letters should include a detailed explanation of the training and explain why either the U.S. or local company will suffer a significant loss of opportunity if an expedited appointment or drop-off service is not available

找公司写封信呗