I used Nikon D3200 to shoot the night scene, and the photos I took were actually like this. What is this?

As you can see from this photo, you were a little shaky when shooting. When shooting at night, it is recommended to use the maximum aperture, and with a higher shutter speed, multiple continuous shooting can be used. Also, remember to raise ISO to above 800. In order to ensure low noise, it is recommended not to exceed 3200.

Also, what are the colored lines at the bottom of the photo? Are the lanterns on the bridge or not? Just find it. If the original position is not a lantern, it may be CMOS damage or data problems. I suggest trying more copies. If the same problem still occurs, it is recommended to send it for repair.

White spots may be dust particles on CMOS or lens. It may also be caused by dust in the air irradiated by the flash lamp. But in jewelry photography, this effect is specially created for beauty. You can clean the dust first and then look at it.