@biyao73 , that is correct --- once you switch to H1-B, you are no longer a student and as such the article 20 is no longer applicable since you are not " temporarily in the USA for education and/or training" but for work / earning. There are of course nuances to this and decision can only be made with when all the facts and circumstances are available. Hypo cases are difficult to take a position on.
pk
