Refining Weapons and Making Costumes, from a Mortal to a Treasure Refining Master

Why does it take other refiners five years to refine a fourth-grade magic weapon, but Han Dong only takes one month? Finished product or top quality? Why can't other weapon refiners refine their spells, but Han Dong can master both spells and weapon refiners, and can cast high-level spells, comparable to a monk who has spent hundreds of years refining spells? Why does it take other weapon refiners hundreds of years to research and imitate a certain magic weapon, but Han Dong only needs one year? Why do other weapon refiners spend tens of millions of spiritual stones to refine high-grade magic weapons, but Han Dong only needs 10,000 spiritual stones? Furnace, furnace, furnace.