Experiment in Van Phuc (Ha Dong) silk workshop to reproduct the Dongsonian ramie and hemp cloth fabrics (Project : Ancient Textile in Vietnam)
The Dongson man with war axe on his shultern as handle of a bronze dagger of 2300 years old.
Muong megalith tomb in 17th - 18th century (Kim Boi, Hoa Binh)
During excavation 2004 in Du Sang rock-shelter ( Kim Boi, Hoa Binh)
PEG-treating in conservating a dongsonian dugout log coffin of 2300 years old