Double chin is the place that you want to cover most when taking pictures, because even if your lower body is slender, the double chin that is inadvertently exposed will make people think that you are a chubby man. The solution is: the neck leans forward and the chin is slightly folded, which not only makes the face look slimmer, but also makes the neck have more shadows and more layers. I personally like taking pictures very much. I usually take a lot of photos, and I feel comfortable posing by myself. The most basic thing is to stretch your neck and strive for a second chin. I can still feel your neck is long. That's all that matters.