When active, players can join this special activity every 23hs.
Pick one out of four chests at each room and there are 15 levels in total. 
After level 5, there is a chance players will be caught by a net which means they have to drop all the rewards collected so far or keep them by spending jades and continuing play the game. 
Levels 5,10,15 are golden rooms. Here there are no nets and players have the possibility of winning golden stamps.