Yulong Guo is a guitar maker (Luthier) from China.  He is the most famous guitar

maker in China and he is starting to receive worldwide recognition because of his 

beautiful modern craftsmanship and incredible sound quality.  His instruments are 

all handmade and crafted with all the most modern technological advancements in

guitar making.  Both Cedar and Spruce models are crafted with a Double-Top 

(soundboard) consisting of a Nomex Lattice structure sandwiched between two 

thin layers of solid wood, creating a strong soundboard.  The outer wood, i.e.

Cedar or Spruce, will have the characteristic sound of that wood.  These guitars

have a raised fretboard and a second sound hole located in the upper shoulder 

bout of the guitar.  The back is arched (violined) for greater sustain and projection

of sound and it has an Ebony armrest.  This is the most "user-friendly"

Classical guitar I have ever played. It is loud without sacrificing sound quality.