How did Rockett know that water droplets were weapons?

Under the magnification of10000000, the water droplets are still absolutely smooth total reflection mirrors, and there are no scratches on the surface of metal fixtures that are in strong contact.

Rockett found that the temperature of water droplets is absolute zero, that is, the molecules of water droplets stop vibrating completely. According to these characteristics, Ding Yi guessed that water droplets were weapons made of strong interaction.

Ding Yi is a character in Liu's science fiction. Famous physicists appear in novels such as Collapse of the Universe, Microscopic End, Wen Chaodao, Three-body, Spherical Lightning, Time Migration, etc., so they are nicknamed sextant by netizens.