The only difference between Zhao Hai and the little crane grass would be their experience. Their rich life experiences allowed them to have a completely different understanding of the natural energy.
From the perspective of the little crane grass, natural energy was closely linked to plants. However, from Zhao Hai's perspective, everything in the natural world contained natural energy. In addition, his spirit energy was different from others, allowing him to communicate with anything. Therefore, even though he was standing in the valley, the poison in the valley was not a threat to him. On the contrary, the poison in the valley would become his tonic.