No worry friend. I understand it is a language barrier. We welcome you, and we help our friends of every language and country. We all speak the same language of music! For the 8 core wire, do not expect better performance. The difference is not noticeable by ear, only scientific measurement equipment. The upgraded wires (including 8 core wire) has better appearance (fashion), and the wire is softer and more flexible than stock wire. It also makes less noise in your ear when the wire brush against clothes (this is called microphonics). It is a cheap upgrade to make your earphones more personal and unique. Like if you change to fancy colored shoe laces on your basketball shoes. They make your shoes have more individuality, amd they may also be better “performance” because they will not loosen and make you fall down. But they will not make you Michael Jordan and make perfect jump shots. Does that make sense? As far as other models, we will help you but there are many choices. We need to ask more questions before we know what model is good for you. What type of headphone sound do you like? Lots of bass? Good midrange? What about treble? What kind of music is your favorite? Jazz? Classical? Pop music? Trance?