The turning angle which was in the front wall of the cabin is generous and smooth as well. The front wall strengthen panel seems better than ever before as the fantastic curve. Furthermore, all the gaps in the cabin was quite rigor and equal. All the features are the symbol of the advanced techniques. Moreover, the improvement of the grid makes the wind inlet rate 47% higher than before and the wind resistance quota 15% lower than before. As a result of the improvem-
-ent, the overheat problem which was lead by the shortage of wind inlet can be solved successfully. The cabin became more beautiful with the excellent bumper.