How many kinds of garbage cans are there in Shanghai? Please introduce

Now the latest requirements are four classifications, that is, divided into four colors of garbage cans, respectively: dry garbage (black), wet garbage (gray), recyclables (blue), hazardous waste (red). Listen to the garbage classification barrel manufacturer said, different cities in their home to order the garbage cans are not the same, the classification will be different, but most of them are named differently, the color is basically divided into four categories.