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["城市id","城市名称","图片id","解锁分数(当前城市最高等级)"]
["id","name","picId","unlockScore"]
[1,"无名小镇",60001,250]
[2,"长沙",60002,500]
[3,"广州",60003,625]
[4,"上海",60004,750]
[5,"北京",60005,875]