Lu Yuanming was extremely surprised and pleased.
He had never found anything wrong with Einstein's Keya.
Since getting to know Einstein's Keya, the Clan Leader of the Cyclops Race, he had always had a very good impression of him.
As a Silver Species from the Silver Age, Einstein's Keya and the Cyclops Race actually possessed a spirit of sacrifice, which alone had filled Lu Yuanming with a favorable opinion of them; moreover, he soon learned that the Cyclops Race was a legacy bloodline of the Titan Giant Clan, one of the Golden Races, which further increased his admiration for them.
Additionally, the fact that Einstein's Keya was privy to many secrets was understandable, given that his ancestors were indeed wealthy and influential.
As for why Einstein's Keya knew about the situation in the Dark Matter World... the same reason applies, after all, his ancestors lived in prosperity.
