art of this style is sometimes called 古今中外. 古ancient今now→modern中in→domestic外out→abroad,means a very wide range on both time and space,"all". here it means to a combination of such things. 古筝guzhen,a traditional ancient cn musical instrument.

normally the way how it's played

I’m Kirari Mizuki🌙✨️ I like astronomy, space, nature, and music ✨️ Thanks for the likes Please follow me👾

@M0NTELLI this is so cool!

reading it in japanese becomes kokonchuugai and means "universal" or "timeless"