The earliest evidence for the beginning of fine art in Vietnam : 18.000 years ago in the hoabinhian sediment of Xom Trai cave (Lac Son, Hoa Binh)

Studing on the dongsonian bronze drum excavated in burial field Dong Xa (Kim Dong, Hung Yen, Vietnam)

The first pebble tool with a narrow and curved polished edge. The tool is collected in the rock-shelter Du Sang (Hoa Binh, Vietnam)

PEG-treating in conservating a dongsonian dugout log coffin of 2300 years old

The S.E.M image to look for prehistoric bacterien from a Dongsonian ramie cloth fabric.