Zhou Zhiyong 
Amnesia Agents 

This book is the fourth volume of the series of The Legend of Beluga. The story background of this book is the same as that of the third volume The Heart of Ocean, which happened in the aquarium of water magic cube. However, Pipi became an agent in this book. As a new actor in the water magic cube, Pipi was particularly curious about everything, especially when he found that his neighbors were totally different at night and during the day. In order to figure out the "latent rules" in the water magic cube Pipi fell into a trap set by Tubaozi and King of the aurora, and became their chess piece. But at last, with the help of everyone, Pipi woke up to and avoided danger at the last moment, making up for the merits, and finally won everyone’s trust and love…