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

Experiment in Van Phuc (Ha Dong) silk workshop to reproduct the Dongsonian ramie and hemp cloth fabrics (Project : Ancient Textile in Vietnam)

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

Muong' weaving decoration with phoenix and dragon designs (Muong Textile Study)

The Dongson man with war axe on his shultern as handle of a bronze dagger of 2300 years old.