The surname Liu is short of water and gold in the five elements. I thought of Rui, so I helped to add three dots of water characters to use Rui.

Liu Gengrui means: "Geng" is the seventh number in the Heavenly Stem, and Geng is gold. Metal generates water, heaven, earth, people, and general mathematics are good.

It may also be called Liu Chengrui or Liu Mingrui. "Cheng" refers to the water, and "Ming" refers to the rotation of the sun and the moon.