A subway train door features a yellow sign with red Chinese characters, "深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深圳深