The Immortal Doctor from All Worlds in the Emergency Department

My name is Chen Changan. I was originally an ordinary doctor. Nowadays, there are many masters of spiritual energy recovery in the city. Zhang Haoran, the second-generation rich man, held a grudge against me and sent people to the hospital to find trouble, causing constant trouble. During a late-night emergency call, I rescued an old man who was dying and got a bronze ring, which opened the Wanjie Mall system. The ring has a small world, where you can grow medicine, refine elixirs, and gather people, and you can also travel through different worlds to complete levels. With the ring, my medical skills and combat power have greatly increased. I can also exchange it for treasures and become a hidden master. While others are still fighting over trivial matters, I have become stronger with the help of my ring, far surpassing everyone else. In the end, I will become the Lord of the Mall of All Realms, protect the earth, and be the legend of the Chengdu doctor.