10.500 years old chared fruit stone fragments of Canarium fruit as food remains excavated in the Hoabinhian cave of Con Mong (Thanh Hoa, Vietnam)

During excavation 2004 in Du Sang rock-shelter ( Kim Boi, Hoa Binh)

Studing in a bronze casting workshop in Lang Rong (Van Lam, Hung Yen)

The Pham Huy Thong Museum with it's laboratories in Yen Hung (Quang Ninh)

During excavation 2004 in Du Sang rock-shelter ( Kim Boi, Hoa Binh)