GIF Animation.
The fixed images would not do justice to the displays at the Chinese Lantern Fest since many of them were originally made with various pieces moving.
To be able to do animation later would require a camera to be fixed on a tripod. If the 2 images were not aligned even a fraction of an inch, the stacked images would not look realistic.
Some photos were taken with digital camera in multi-frame and then stacked together on computer using .GIF animation...