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感谢8老师， 确实有律师帮我做，但是他不确定是否应该写上。他说写上去如果对方办事不那么仔细，估计就算进去了，然后再找对方argue，而他也没有遇到过类似H3 的例子。所以诚实来说，我们不应该自己认为不算进去就不写吧？ 还是说，律师认为不应该算进去，所以可以不写？ 
-In my opinion, based on the requirement in "3. list each beneficiary's prior periods of stay in H or L classification in the United States for the last six years" in H Classification Supplement to Form I-129, you had better report your H-3 time in the I-129. USCIS will not count it into your H-1b time when your employer choose "a. H-1B Specialty Occupation" in "4. Classification sought (select only one box)" part.  Of course, if choosing "g. H-3" or "h. H-3 Special education exchange visitor program", then your H-3 time will be counted.