1. Made with high quality solid OAK
2. It is moisture-proof. crack-resistant. deformation-free. heat insulation and insect-proof
3. The technique of wood process takes the advanced technique of Japan. The lumbers has been dried in high technique
4. The water-cotaining rate is within 8-12% and all indexes meet the international standard
5. All equipment imported from Japan and German and advanced manufacture technique adopted.