《水经注·卷十九》
铸了铜凤一只，高五丈，以黄金作为装饰；楼屋上方的椽头上贴着玉璧，因此叫璧玉门。
铸铜凤，高五丈，饰以黄金，楼屋上。椽首，薄以玉璧，因曰璧玉门也。
A five-meter-tall bronze phoenix was cast, which was decorated with gold; the rafters on top of the towers were overlaid with jade, and therefore the gate was called Biyumen.