April 24 is the seventh China space day. At this moment, on the orbit nearly 400 kilometers above the ground, Tianhe core module “feels good” and has received two groups of “visitors”, waiting for the moment when the space station is completed this year; At an orbital altitude of 36000 kilometers, Beidou satellite has become a “Navigator” in everyone’s life; Hundreds of millions of kilometers away from the earth, the Mars rover zhurong continues to write the “Adventures of Mars”.