Experiment in Hoa Binh CESEAP-station to resaerch the flying distand of bronze arrow-head excavated in the Ancient Co Loa Citadel (Hanoi)
A silk fragment with weaving design of trade workshop name excavated from 18th mandarin's tomb (Project : Ancient Textile in 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)
Studing in a bronze casting workshop in Lang Rong (Van Lam, Hung Yen)
During excavation 2004 in Du Sang rock-shelter ( Kim Boi, Hoa Binh)
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