《明史·列传·卷一百三十二》
等到他返回时，改乘四马大车，用羽毛装饰仪仗旗帜，用青蓝色装饰车盖，两旁夹道护送，层层保卫，俨然是皇帝乘车的模样。
及其归也，改驾四马，羽幢青盖，夹护环遮，俨然乘舆矣。
On the way back, he took a big carriage with four horses. His banners were decorated with feathers, the carriage cover was decorated with pale blue, and layers of guards escorted him. It was like the emperor was in the carriage.