It is studied that pointwise estimates and continuities on Hardy spaces of pseudo-differential operators (PDOs for short) with the symbol in general H\"ormander's classes. We get weighted weak-type (1, 1) estimate, weighted normal inequalities, (H^p, H^p) continuities and (H^p, L^p) continuities for PDOs, where 0<p1.
Guangqing Wang (Sun,) studied this question.