Haier has has several models and of different sizes with different Android Firmware installed on them.
As you have not mentioned which of the model you are using , so specific solution can not be given,
Here are some of the solutions :
1. Tap System Settings--Tap Backup and Reset--Tap Reset Factory Data,
This will reset your tablet and let you off the hook.
2. For a Hard Reset,
Here are some combinations to reset the device:
I. Volume Up + Home + Power,
II. Home + Power,
III. Volume Up + Volume Down + Power,
IV. Volume Up + Camera,
V. Volume Up + Volume Down + Power.
Try them , any of them can do the Hard Reset.
Backup data, remove SD and SIM card, Fully charge the Tablet before Resetting.