I Have an Extraterrestrial Antenna in My Head

An alien antenna fell from the sky and hit Li Yi on the head. When he reacted, a galactic civilization exchange group appeared in his mind. In the group, there are either arms tycoons selling planetary cannons, genetic Frankensteins, or interstellar social beasts who fish for fish every day. Others use alien technology to dominate the interstellar world, but Li Yi doesn't. A bunch of roasted garlic is exchanged for a bottle of genetic medicine, and ten skewers of meat are exchanged for a piece of black technology.