Uncle iroh’s “card” game

Does anyone know how to play this?? I’ve seen that a lot of people say it’s solitaire… but this one only has 4 different “tiles” as far as I can see… so how do people play this?

Does anyone know how to play this?? I’ve seen that a lot of people say it’s solitaire… but this one only has 4 different “tiles” as far as I can see… so how do people play this?