What the per-Tấn rate represents
The figure at the top of this page converts the international Niken benchmark into a price per Tấn, expressed in Đồng Việt Nam. Industrial metals are quoted on exchanges in tonnes or in cents per pound, which is convenient for traders and useless for a fabricator pricing a job. Converting to a per-Tấn figure lets you multiply straight through by the mass of the material you need.
Because it tracks the live market, this number changes throughout the trading day. Global Niken trading is effectively continuous from the Asian open through to the New York close, so a rate you noted in the morning may no longer hold by the afternoon. Anyone quoting or accepting a price for a large quantity should refresh the page immediately before committing rather than relying on a figure carried over from the previous session.