Two of the five places with a concealed halo were the cave he was in and the pool that Liu Yun had taken Zhou Wen to.
Zhou Wen chose to open the cave in-game. Just as he was about to enter the cave, Liu Yun had already released his Companion Beast that sneaked towards the grass fruit.
It was a Companion Beast that looked like a rat, but it was slightly bigger than a cat. After it was summoned, its body jolted before it vanished in front of Zhou Wen. It was unknown what kind of invisibility it had used, but even his hearing couldn't sense its existence.
Liu Yun actually has such a Companion Beast? Zhou Wen was alarmed. Just as he was about to use other methods to see if he could track it, the Companion Beast had already crawled out of the stone chamber and headed for the grass fruit.