Douluo Dalu: Invincible Starts from Check-In

The protagonist travels through the Douluo Continent to see how he conquers the Douluo Continent and conquers the God Realm. It runs through four Douluo fics. It's cool and funny. Write what you want to see. From one to four, write about Douluo One. Those characters and setting arrangements that we feel sorry for. Fill in the pitfalls that I think are perfect. Also what we want to see. Write about Douluo Four. It follows the original work and has some changes. I'm a newbie. Please forgive me if the writing is not good. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.