Everyone wanted to explore the secret of its density.

In the midst of various explorations, everyone tried their best to investigate its quality, measure its product, and hope to understand the density of hafnium.

Or set up an exquisite experiment, put hafnium in a secret room, put hafnium in a tool, measure its weight and the space it occupies in detail, measure it repeatedly, and don't dare to slack in the slightest. Or study the classics and find traces of the predecessors, hoping to get one or two inspirations.

All kinds of efforts are centered on the density of hafnium.