为什么普遍使用json？

{

    "name": "中国",

    "province": [{

        "name": "黑龙江",

        "cities": {

            "city": ["哈尔滨", "大庆"]

        }

    }, {

        "name": "广东",

        "cities": {

            "city": ["广州", "深圳", "珠海"]

        }

    }, {

        "name": "台湾",

        "cities": {

            "city": ["台北", "高雄"]

        }

    }, {

        "name": "新疆",

        "cities": {

            "city": ["乌鲁木齐"]

        }

    }]

}