The fat man in Douluo Mainland is called Ma Hongjun. Ma Hongjun is the protagonist in the fantasy novel Douluo Continent written by Tang Sanshao, and one of the original works of Shrek, ranking fourth in age. He has a mutated martial spirit and an evil fire phoenix. At the same time, Ma Hongjun is also the deputy patriarch of Tangmen. When he was a child, he was brought back from a village by Shrek Dean Flanders. His fighting spirit was harmless poultry. Ma Hongjun took the cockscomb sunflower to remove the evil fire impurities and continued to evolve into the top martial spirit and ten fire phoenix, and then rose to the divine world to become the second-class phoenix god.

Ma Hongjun was born in an ordinary small village, where people's martial spirits are ordinary birds, but his martial spirits have mutated into a top evil fire phoenix. But because of the evil fire in his body, he needed to have sex with women when he woke up at the age of six, and then with the help of Tang San, he cleaned up the evil fire in his body, and together with Tang San and others, he became the first generation of Shrek Seven Monsters in Shrek College and ascended to heaven.

In Douro, he is a fat man with red hair, a Mohist dry hairstyle and two moustaches. After eating ten pills of fierce Yang snake Neidan on Poseidon Island, he burned all his fat and became a thin man.

But he became the god of the phoenix, and after he ascended to the divine world, he became a big fat man again. He met the love of his life, white aloe, but the talent of white aloe was not enough to ascend to the sacred world, and he died. For decades, Ma Hongjun has been immersed in the pain of losing his lover, and his character has become depressed.