Ye Yinzhu was surprised to feel the playful tone of Zi's voice, it was the first time that he had ever detected such an emotion from his dearest brother.
He went silent for a moment and then said seriously, "Zi, you have to promise me, if you encounter any danger, you will summon me to your side as soon as possible. As you know, when we are together, nothing can stop us."
Zi nodded, "Alright, I promise."
