I don't think the black city looks like a black garbage bag.
And I don't know why you ask the white one??
White city doesn't come out each season and year.
You may check the thread about the color in each year.
You're asking two different questions that have nothing to do with one another. Ruirui tried to help by answering but honestly - your title asks about white yet the text discusses black. That's probably why she questioned why you were asking about white, because your text has nothing to do with white bbags!