The main piece with a wooden body on the writer's glass face shows a new format that began in 2013. Trees no longer support the glass's accessories or glass, but have a voice that is on par with the glass. Wood is a solid piece of material that must be cut down, while glass is a liquid composition that must be melted and glued together. These two conflicting materials naturally meet as one in the work. Park tried to work as softly as a tree handles liquid like a glass, and as delicately as a tree does a piece. This is similar to the author's desire to get rid of the pile of life and pursue only the essence, as the process of addition and subtraction is repeated in Glass+Tree work.