They are works called 『Birthday 1.0 』and 『Birthday 2.0』.
『Birthday 1.0 』 is wrought iron. The materials are iron, wood, plaster and dye.
『Birthday 2.0.』 is a mixed-media sculpture. The materials are polystyrene particles, glass, water-absorbent resin, postassium permanganate, wall patties, wood, and Beeswax cream.
This work was made to pay attention to industrial pollution issues.