Metal-poor stars in our Galaxy are the best preserved fossils of the formation history of Our Galaxy. <br /><br />
Especially, chemical composition of them provides important clues to understanding the early stage of the chemical evolution of the Galaxy. <br /><br />
Recently, our knowledge of the Galactic formation improved based on kinematic and chemical information of the halo stellar component.<br /><br />
I\\/ll talk on the recent interesting results including our results from BOES data. <br /><br />
Add to that I\\/ll briefly introduce surveys such as Skymapper, SEGUE, LAMOST and HERMES.