Possible constraints (1)For H: all direct and indirect experimental constraints are the same as for the SM higg 2s Doson (2)For H and Ao: the experimental constraints are similar as in the usual 2HDM except for the invalid constraints from various B-de ecavs (slich as b-78y. For example, from the unobservation of ete--H*H- at LEF II. H# should be heavier than about 100 GeV and thus A4 cannot be too sIna (3) For the ultra-light h: stringent constraints both from particle physics and from astrophysics are derived from its interactions with either photons electrons or nucleons. For example. stringent constraints may come from positronIum decays, Ineson decays, quarkonium decays or nuclear tran sitions. In our model. fortunately these constraints can be avoided or become quite weak since the coupling of h with photons, electrons or nul- eons are suppressed by 02/01 n 10-14 at tree-level. The most dangerous constraints may come from the invisible z decays. For example. from the three-body decay Z-h(A)*-hvv, some lower mass bound(say Tev) may be set on APossible Constraints: