Tips for visiting the Forbidden City on a wheelchair

It is absolutely possible to visit the Forbidden City on a wheelchair
But the area you can visit is very limited. I say about 1/3 of the palace is accessible on a wheelchair
However, this 1/3 includes all the biggest highlight the Forbidden City has to offer. You will see the main north-south axis that contains the grandest halls, as well as a peek into a section of the private quarters of the emperor and his family
If you do plan to visit on a wheelchair, make sure to come visit during a less crowded season because it can get very very crowded that makes it hard for you to move around. Do not visit between October 1st to 15th as that's a National holiday and is the busiest time. All through summer it's quite busy as well
Keep in mind that the surface of the entire Forbidden City is not smooth. Most grounds are made up of differently-sized stones used in the ancient times. It's not the easiest place to visit on a wheelchair even though it is considered accessible
Here is the update-to-date (as of December 2018) official wheelchair accessibility map (from the official website here):

Let me add an updated version of this brief