First, read the English article below.

Whether you've just gotten your tattoo or have had it for longer than you'd like, using salt to remove a tattoo is a dangerous proposition. Here's why:  Your skin has effectively two layers — the dermis, or inner part of the skin, and the epidermis, or outer layer of your skin. When you get a tattoo, the ink travels past the epidermis, or superficial layer of skin, and into the dermis. Rubbing salt onto the epidermis is easy but useless. You need to get the salt into the dermis; even if you did manage to rub away the top layer of your skin to get at the ink, it's probably not going to end well. Rubbing your tattoo with salt will give you a pretty nasty road rash. It may also cause pigmentation of the skin, wrinkling, and possibly scarring. Know that doing this procedure at home can have significant adverse consequences, and may make your tattoo look even worse. Although there is a dermatological procedure that uses salt as a slight abrasive, there is probably one glaring reason why salt is thought to be a good tattoo eraser. When you get a tattoo, you're told not to submerge your tattoo in water, especially in salt water. If you're not supposed to soak your tattoo in salt water if you want to keep it, maybe you could soak your tattoo in salt water if you didn't? That's the reasoning at least. Soaking your tattoo in salt water, in fact, will only cause the ink to disperse, run, or possibly fade. It won't cause your tattoo to magically vanish. It's likely your tattoo will look worse after you soak it in salt water if your tattoo is newly inked. If you've had your tattoo for several weeks or longer, it's likely that submerging your tattoo in salt water will have no effect. Trying DIY salt abrasion, also called salabrasion, is probably not the best idea. As mentioned earlier, you're likely to hurt yourself and do more harm than good. But there are professional procedures out there that use salabrasion, and some of them can be promising.  According to a German study in the National Institute of Health database,... 

Now, please write a short abstract for it in Chinese. Abstract:
将盐擦到纹身里面时要非常小心。 了解这种方法的起源。 知道用盐作为研磨料的方法确实存在。