J-1 收入不交税，L-1 收入交税？

ARTICLE 19 (Teachers, Professors and Researchers)      An individual who is, or immediately before visiting a Contracting State was, a resident of the other Contracting State and is temporarily present in the first-mentioned Contracting State for the primary purpose of teaching, giving lectures or conducting research at a university, college, school or other accredited educational institution or scientific research institution in the first mentioned Contracting State shall be exempt from tax in the first mentioned Contracting State for a period not exceeding three years in the aggregate in respect of remuneration for such teaching, lectures or research.

第十九条教师和研究人员 任何个人是、或者在直接前往缔约国一方之前曾是缔约国另一方居民，主要由于在该缔约国一方的大学、学院、学校或其他公认的教育机构和科研机构从事教学、讲学或研究的目的暂时停留在该缔约国一方，其停留时间累计不超过三年的，该缔约国一方应对其由于教学、讲学或研究取得的报酬，免予征税。