It seems to me a female of the genus Acrocyrtidus (Compsocerini), like those present in the gallery. In Laos at least two species are present: A. aurescens Gressitt & Rondon, 1970 and A. argenteus Gressitt & Rondon, 1970. On the basis of these names, I guess the former but I need for further research in order to identify the species.
It is confirmed: your species is Acrocyrtidus aurescens Gressitt & Rondon, 1970. A. argenteus Gressitt & Rondon, 1970 is the species at the side (Vietnam, Tam-Dao).