When Zhao Hai communicated with the plants, he used the power of his mind. Once the power of his mind entered the plant, Zhao Hai would treat himself as a plant for a short period of time. He would understand how it felt to be a plant. If the plant died, Zhao Hai's mind might die with it. In that case, Zhao Hai might become a vegetable.
Fortunately, Zhao Hai had the experience of communicating with the giant tree, so he didn't fall into the trap. It was because of this that Zhao Hai knew that even in the origin space, it was dangerous for him to do so. However, he couldn't tell Laura and the others about this. Otherwise, they would only be more worried.
