看了您的回答更头疼了，因为我每次都是在国内待五六个月后再在美国待五六个月。这样的话我的服务期岂不是应该归零。我还要在国内连续待两年才行？
-Not need to be 国内连续待两年, but it is aggregate of two years. That means you can visit US and stay in US for a certain time, not specific how long. So, you may be still OK to calculate your total time of stay in China for the home resident requirment. When it reaches total of two years, you may apply for the green card or H1.
What I commented above is that I am sure short visiting US (e.g.2 to 3 months) during the home resident should be OK, but it does not mean "每次都是在国内待五六个月后再在美国待五六个月" will "服务期应该归零" (I am persionally just not sure it).
