Traveler from the Stars

I am a traveler, my name is Luo Feng, where do I come from, is it the misty and illusory starry sky? Where am I going? Why did you choose me among hundreds of millions of people to come to this strange continent of Teyvat and start this unknown adventure? Why did Lan Haili, another traveler I met by chance in the starry sky, appear next to me so suddenly? Why are he and I going to the same destination, why do we seem to come from the same world? What is the purpose of this world? What is the purpose of the starry sky?