Give me 2 or 3 fresh leaves. I try to find some interestings.

Is it some Celastraceae plant/?  I cannot  identify this

Or perhaps a Rubiaceae plant... such a big family!!

Perhaps links below are useful to you:

Checklist of Flora of Laos

https://portals.iucn.org/library/efiles/documents/2007-014.pdf

Rubiaceae in Flora of China:

http://flora.huh.harvard.edu/china/mss/volume19/Flora_of_China_Volume_19_Rubiaceae.pdf

Regards.

I don't think it is member of Rubiaceae, because it has not stipule

It should be a Celastraceae.

is it a tree, shrub or vine? It could be caprifoliaceae

It seems to belong Rubiaceae family!

myrtaceae ... the leaf looks like myrtaceae

myrtaceae ... the leaf looks like myrtaceae

Hoang Thanh Son

It is a Loganiaceae plant, Gardneria ovata Wall.

Thanks!