I recommend the two novels,"Immortal Cultivation All Depends on Exchange Code" and "Hero Girl Summoning". Their plots both involve exchange and summoning. "Immortal Cultivation All Depends on Exchange Code" told the story of the main character Su Ming, who completed his path of immortal cultivation by collecting exchange codes in the world of immortal cultivation."Hero Girl Summoning" was a story about a transmigrator who could defeat evil forces by summoning a hero girl. I hope these two novels can satisfy your needs and enjoy the reading process ~