Use Mirek190‘s custom partition table method. Replace the Android ROM’s stock ‘partition.tbl‘ file with the custom partition template of your choice (In your case, pick the “Android Only” template). Then flash your tablet with MFT following the steps provided in one of my posts.
Mirek’s custom partition pack can be downloaded here: http://techtablets.com/teclast-x98-air-3g/downloads/
This method was originally made for the Teclast x98 Air 3G, but it works just fine on Chuwi Hi8.