Rather than upload it I’ll post the instructions I followed. It’s likely to change over time so better to get it from the source.
Start by installing Baidu on either your pc or android. Create an account. You need to log into Baidu without using chapta as it contains pint in characters. You can do this through the app or by using a different log in page on your browser. Google will find it for you.
Go to the link in the second post. This contains the links to the different ROMs.
Copy and paste the url. In the new forum, you need to post something in order to see the link. The link downloads a txt file which contains the Baidu link.
In Baidu you need to give the original poster some points to get the file. Don’t worry you get enough from creating an account. The file will be added to your Baidu account.
Download the file using the pc app or the android app. Don’t try to do it using the web interface, it always times out before finishing.
Install the file using the Intel flash tools. There are plenty of instructions for this on the forum.
FYI I replaced the gpt file to remove windows which caused an error message but no actual problems. If you get an error message try booting anyway.
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