I Feel so Happy Traveling Through the Heavens

The main thing is fun. The protagonist of Explosive Hammer's brainless and cool novel travels through time and space, practicing martial arts. If he wants passion, he has fun, if he wants fun, he has holes, and if he wants holes, he has Long Yi, Ga Ga Ga, and the main theme is buying and selling. You little motherland people still dare to be arrogant, look at me - the moon and the sky are violent! In the first world, glass beads were exchanged for martial arts resources, and Gou's group did not dare to take the lead. In the second world, I am a loser. In the third world, my heart is as calm as water, and I look at the sun with clear features. (Note: The system in this book can travel around the world at will).