Have difficulty closing the open polysurface!

[jdlai.tw]

I tried many ways close this open polysurface but they wouldn’t work. Can any one tell me what’s wrong with the file?Thanks! (578.0 KB)

[Normand (Jakob Normand)]

Hi @jdlai.tw
Looks like something went wrong with the upload. Could you try to re-upload the file? I’m sure someone will take a look
-Jakob

[jdlai.tw]

spoon.3dm (578.0 KB) try this !thank you.

[pascal (Pascal Golay)]

Hello - the border curve for the plane that closes the shape is not quite planar:

-Pascal

[jdlai.tw]

Thanks, Pascal!
Finally got the wrong place .Trying to fix it!