What's inside the ceramic heater of a Chinese soldering station (re-uploaded)

What kind of heater is installed in Chinese soldering irons and soldering stations. The Chinese themselves (and our sellers too) proudly write CERAMIC in the product descriptions. But is it? In the comments to one of the videos, one knowledgeable person said that there is nothing ceramic there, except for the shell. Whether this is really so, you will find out by watching this video, in which, using the example of a heater from a Lukey 702 soldering station (most likely others too), I will reveal this little marketing secret.
PS no oops :)