Fanyun Fuyu Thirteen Fortresses(Part Four) The gloomy sky weighed heavily, oppressive and dull. Yu’er, hindered by her uncooperative legs, had already run out of breath by the time she reached the city’s outskirts. The piercing cold wind of early spring chilled her to the bone, and the muddy road sullied her snow-white boots. Yu’er ran on, her eyes darting around,…