回复：多谢863211大侠，补1个小问题。

我现在J1的收入是免税的，如果申请H1B，听说是要交税。
那么我的老板或系里是不是得给我加工资啊？
-Yes. Based on the immigration law, the employer has to pay your salary at the prevail level, otherwise USCIS will not approve the H1 petition if the professor pay you lower salary.
要不然，依照现在的工资水平，再交税的话，收入会缩水。一旦加工资，他们（系里或老板）岂不是很不情愿？维持我的J1身份对他们似乎更有利。
-That is true. That is why the professor does not want to support the visiting scholar H1, but give the scholar J1 status.

By the way, J1 waiver is not difficult if your salary is paid by your boss, not Chinese Government. Also, you can apply for green card now (filing I-140) using NIW or EB1A category if you want and your qualification is good. Then, after one year later you can apply for J1 waiver and then, file I-485 to get the green card after you get hte J1 waiver.