I Am a Doctor in Another World

He Fan is an orphan raised by his adoptive parents. The adoptive parents disappeared. He Fan, who was a little depressed, accidentally opened the time-travel machine left by his adoptive parents. However, the time-travel machine was actually in the closet? He Fan traveled to an ancient world where there was no WiFi or mobile phones. How can I do this? Let me change this stupid world. The new author will write every chapter carefully. If you like the book, you can add it as a book friend for discussion. If you have any shortcomings, you can also communicate in the book review area or discussion. Thank you all. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.