Ya know. The more I look at it, the more it looks like a model.
It's kinda funny for a plane taking off not to have the flaps down.. Isn't it?
Unless it really doesn't need the 'lift'. /s
The art (image of J-20 in flight) was created by well known CGI artist Gao Shan in all good faith. It was subsequently ripped off by another person, photoshopped and posted as real. It is a confirmed fake.
Link to explanation of Photoshopped image