As the previous version of the HE2025 ground attack aircraft removed the vertical tail, we decided to have the horizontal tail serve as part of the vertical tail. However, we overlooked the relationship between the area of the horizontal tail and the stability of the aircraft. In reality, the area of the horizontal tail should be the wing area multiplied by the cosine of the installation angle. When the horizontal tail is tilted upwards, the corresponding area of the horizontal tail on the horizontal plane decreases, which leads to the aircraft bouncing during landing. In this version, we have increased the wing area to make up for this deficiency.