Qin Shi Huang Mausoleum - Level 3-4 was the third and final spin-off level of Qin Shi Huang Mausoleum - Level 3-1 in Plants vs. Zombies Online. It was a Brain Buster and was a Carrot Rocket Launch level. There were no pathways, and there were pre-placed Carrot Rockets on the lawn. When this level was finished for the first time, the player would get 100 upgrade sun to upgrade certain plants and three Spring Bean Puzzle Pieces.
The player could fire the first Carrot Rocket by using the "S" button, the second one by using the "A" button and the third one by using the "D" button.
- This level is harder than the previous ones, since the player has to control three Carrot Rockets at the same time to defeat zombies.
- Iron Helmet Sergeants can cause trouble since they take three explosive carrots to kill and they usually come in group. Because of this, the Carrot Rockets can be eaten quickly if the player doesn't act fast enough.
- If you are still having trouble, use Squash, because it can prevent you from losing stars.
- A trick is to simply wait until the zombies are close enough, then use S, A and D buttons at once to fire all of your Carrot Rockets.