Create surface according to these curves

Hi I was trying to create a surface according to these curves. I have tried networksrf, but it doesnt work. Can anyone show me how to do it? Thanks!

Frankienetworksrf.3dm (40.6 KB)

networksrf.3dm (205.1 KB)

@frankiebingxinyu Looks like you used Group instead of Join on the long red curves.

Group causes all members of the group to be selected together. It does not join the members.

Join creates a single polycurve or polysurface from two or more curves/polycurves or surfaces/polysurfaces.

The input to NetworkSrf needs to be curves or polycurves, not groups of curves.

Thank you David, it works~