Qin Shi Huang Mausoleum - Level 9-4 is the fourth spin-off level of Qin Shi Huang Mausoleum - Level 9-1 in Plants vs. Zombies Online. It is a Brain Buster and it is a Terracotta Statues level. There are no pathways in this level. When this level is finished for the first time, the player will get 100 Upgrade sun to upgrade certain plants and three Grave Buster Puzzle Pieces.
To complete the level, the player must remember the position of the zombies before they become teracotta statues so that when the teracotta statues are swapped, the player can use the mallets to smash the correct ones in time.