My definition of interaction:

In my understanding, interaction refers to the reciprocal actions that can lead to certain effects between the different subjects. One subject takes an action which makes some effects on the other (others), while this subject also receives an action from the other (others) which has some effects on this one. Usually, one action should be a response to another(others).

The project aligns with my  definition:

The light waves

https://www.manamana.net/video/detail?id=70417#!zh

This is a project is made for a music festival in Poland. There were 15 drums and a floating helium-filled sphere. The audience invited beat the drum together, which triggers the light and sound which feel like energy goes towards the sphere. The reciprocal actions happened between audiences and the installation. Actions are taken when the audience is beating the drum,  and the installation receives these actions and starts to light as a response.  The response of the installation itself is the evidence that influence is made by the audience on it, while the final effect, which enables the audience to receive the information about light and sound, makes an influence on the audience too.

The project does not align with my definition:

naked eye 3D animation in Chengdu Jinjiang 

https://www.manamana.net/video/detail?id=1539903#!zh

The naked eye 3D animation enables people to see the 3D effect without the help of external equipment such as 3D glasses.  I don’t consider it as an interactive project because the actions taken there are not reciprocal. On one hand, the observers look at the 3D screen but do not affect it. On the other hand, the screen just shows the images that have been set before, though the images can make some effects on the observer by conveying some information, it does not receive any action from them.