The most famous hoabinhian cave of Xom Trai (Lac Son, Hoa Binh, Vietnam)

Experiment in Hoa Binh CESEAP-station to resaerch the flying distand of bronze arrow-head excavated in the Ancient Co Loa Citadel (Hanoi)

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

Vegetable remains excavated in 2100 years old Dong Xa burial field of the Dong Son culture (Kim Dong, Hung Yen, Vietnam)

Ethnobotanic Study 2005 in a Muong hamlet (Kim Boi, Hoa Binh)