Uh~~ It’s probably real black tea. Although the Pu'er we usually drink is black tea, it tastes similar to green tea.
I went abroad before and drank their black tea. It smelled so good and I always felt that the taste was very familiar. Just follow the example of the people next to you and add some creamer and sugar, then drink it and you will have the most authentic milk tea flavor. The tea I usually drink at home will never have that taste no matter how much I add it.