The Immortal Doctor of the Emergency Room, Healer of All Worlds

My name is Chen Chang'an. I used to be an ordinary doctor, but now spiritual qi revival has brought a wave of experts to the city.

I made Zhang Haoran, a rich second-generation heir, resent me. He sent people to cause trouble at the hospital, and problems kept piling up.

During a late-night emergency, I saved an old man on the verge of death and received a bronze ring, unlocking the Myriad Worlds Marketplace System.

The ring contains a small world where I can grow medicinal herbs, refine pills, and gather people. It can also let me transmigrate to different worlds and take on challenges.

With the ring, my medical skills and combat strength soared. I could even trade for treasures, becoming a hidden expert.

While everyone else was still fighting over trivial matters, I kept growing stronger with the ring, leaving them far behind.

In the end, I will become the lord of the Myriad Worlds Marketplace, protect Earth, and become a legendary doctor of the city.