Xu Lu

A curious detail in the new historical drama The Vendetta of An (长安二十四计) has captured the audience's attention. In it, actress Xu Lu (徐璐), who portrays the character Bai Wan (白莞), wears a cloak with an unusual feature: a separate panel of fabric draped over its back. This double-layered design strikes many modern viewers as anachronistic or simply strange, prompting questions about its historical accuracy. Could a cloak really be constructed this way in ancient times, or is this a fanciful creation of the costume department? The answer lies not in creative license, but in a forgotten practicality shaped by climate and necessity. A Functional Design The additional back panel is not mere decoration. It functions as a rain guard or wind flap. Its primary purpose was to create a protected air space between itself and the wearer's back. When rain or sleet fell, it would hit this outer layer first. Following gravity, the moisture would then slide down the panel's surface and away from the body, keeping the inner cloak—and the crucial lower back and waist area—dry and insulated. This logic is enhanced when the cloak material itself is water-resistant. Historical garments often used oils, waxed fabrics, or inherently…