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Thank you for the link that you offered,Daniel Mosquin.
David Tarrant and Douglas Justice,thank you very much for your help.
This picture is taken at Hanzhong which is in the south of Shaanxi...
I am so sorry that this is only picture I have.This plant is a small arbor,but not a vine,which is all I have known.
Please help identify this strange plant,I never see it before.
Thank you very much!
Thank you for the clue that Ron B provided.
Is it Begonia boliviensis?
I really want to know this beautiful plant,can any one help me?