  Early shallow-decaying X-ray afterglows of gamma-ray bursts (GRBs) may be
attributed to the dipole radiations of newly-born magnetars. Assuming that the
GRB jets powered by magnetars are quasi-universal, we find that the jet
structure can be parameterized as a uniform jet with a luminosity of $\log
L_{\rm j}/{\rm erg\ s^{-1}}=52.68^{+0.76}_{-0.33}$ (1$\sigma$) and an opening
angle $\theta_{\rm j}=2.10_{-1.28}^{+1.90}$ (50\% confidence level),
surrounding by a power-law decay component with an index of
${-4.00^{+0.27}_{-0.37}}$ (1$\sigma$). The inferred local GRB rate is
$\rho=9.6$ Gpc$^{-3}$ yr$^{-1}$ by including both the typical GRBs and LL-GRBs
as the same population. The typical viewing angle is $3.3^{o}$, and may be
$20^{o}\sim30^{o}$ for LL-GRBs. The X-ray luminosity function of the dipole
radiation wind can be empirically described by a broken power-law function with
indices $\beta_1=0.78^{+0.16}_{-0.15}$ and $\beta_2>1.6$ broken at $\log L_{b,
w}/{\rm erg\ s^{-1}}=48.51^{+0.53}_{-0.65}$. In case of that the wind outflow
is collimated and co-axial with the GRB jet, we find that the wind structure is
similar to the GRB jet, i.e., $\log L_{\rm c, w}/{\rm erg\
s^{-1}}=48.38^{+0.30}_{-0.48}$, $\theta_{\rm c,
w}={2.65^{o}}_{-1.19^{o}}^{+0.1.73^{o}}$, and $k_{\rm w}=4.57^{+1.21}_{-0.75}$.
The observed correlation between the prompt gamma-ray luminosity and X-ray
luminosity of the wind may be resulted from the viewing angle effect in such a
jet-wind system. Discussion on survey with the X-ray instruments on board the
{\em Einstein\ Probe} mission in the soft X-ray band for the jet and wind
emission is also presented.
