C1307 Internal and External Problems

The elder from the Dwarf Clan gave Su Yi a once-over. Realizing that Su Yi was not even twenty years old, he was deeply shaken and hurriedly said, "Elder, my name is Guan Yu. Thank you for your timely rescue!"

Despite being much older than Su Yi, in the world of martial artists, respect is accorded by strength, not age. Su Yi was far more powerful, so referring to him as 'elder' was fitting