Please give me the name of a novel!

Please give me the name of a novel! The protagonist of the novel was originally an ordinary Earthling. Later, he obtained a ring and was unknowingly brought by the ring to a world that was completely parallel to the original time and space. It was a world that was similar to traditional magic. The protagonist was tested to have two innate talents during the physical test. His initial talents were Lightning and Fire. Later, after successfully advancing, he had the Darkness and Summoning Elements (I can't remember clearly here). After advancing to the Advanced Level, he self-awakened to have the Demon and Space Elements (the first two awakenings were awakened through guidance). The main character had a disabled sister (who wasn't his biological sister). She started to study at a magic academy in the country and later transferred to the Parthenon Temple as an exchange student. The main character had a friend who was a snake. This snake seemed to be a Lord-tier monster that lived and guarded Hangzhou all year round. The main character joined a mercenary group or something similar. There weren't many people, and the main character often teamed up with a little girl (the little girl debuted very early. Although she wasn't strong, she had a lot of experience). The main character had participated in an international college exchange competition, but he had accompanied a friend halfway through the competition and voluntarily left the team.(This friend was a woman, and my personal guess was that she was one of the female leads.)