Threshold effects as the origin of Z${}_{cs}$(4000), Z${}_{cs}$(4220) and X(4700) observed in B${}^{+}$ → J/$\psi \varphi$ K${}^{+}$

We investigate the B${}^{+}$ → J/$\psi \varphi$ K${}^{+}$ decay via various rescattering diagrams. Without introducing genuine exotic resonances, it is shown that the Z${}_{cs}$(4000), Z${}_{cs}$(4220) and X(4700) reported by the LHCb collaboration can be simulated by the J/$\psi$ K${}^{\ast +}$, ${\psi }^{\prime }$ K${}^{+}$ and ${\psi }^{\prime }\varphi$ threshold cusps, respectively. These cusps are enhanced by some nearby triangle singularities. The X(4685) with J${}^P$ = 1${}^{+}$ cannot be well simulated by the threshold effects in our model, which implies that it may be a genuine resonance.