candace sun

Also thanks to Benyee and mestela!

tamte
your outline are made of many curve segments
the best is to convert them to closed curves using PolyPath
then you can remove inline points using Facet SOP
and if you want open back up using Ends SOP

That's exactly what I want! Thank you Tomas, this is really helpful!
I don't know why when I added 'PolyPath' in my own file, it was displayed differently from your file, but luckily the 'Ends' solved this problem finally.

Thank you very much for your replies, but I followed your approach and still haven't got the result I want. I uploaded my hip file, can you please use my file to achieve it?
Thank you for your time!