Po is a general term that describes an outer robe or overcoat in Korean traditional clothing.
Po (clothing)
Dragon robe (or ikseongwanpo): business attire for kings
Hongryongpo: everyday clothes for kings
Hwangryongpo: everyday clothes for Sinosphere emperors, styled after the Chinese imperial robe. Once restricted to Chinese emperors, Gojong began to wear the yellow robe after establishing the Korean Empire.
Paofu, also known as pao for short, is a form of a long, one-piece robe in Hanfu, which is characterized by the natural integration of the upper and lower part of the robe which is cut from a single fabric. The term is often used to refer to the jiaolingpao and the yuanlingpao. The jiaolingpao was worn since the Zhou dynasty and became prominent in the Han dynasty. The jiaolingpao was a unisex, one-piece robe; while it was worn mainly by men, women could also wear it. It initially looked similar to the ancient shenyi; however, these two robes are structurally different from each other. With time, the ancient shenyi disappeared while the paofu evolved gaining different features in each succeeding dynasties; the paofu continues to be worn even in present day. The term paofu refers to the "long robe" worn by ancient Chinese, and can include several form of Chinese robes of various origins and cuts, including Changshan, Qipao, Shenyi, Tieli, Zhisun, Yesa.
Men and women dressed in jiaolingpao (cross-collar robe), Han Tomb Mural, Luoyang
Zhao Mengfu wearing a yuanlingpao (round collar robe), dated 1296.
Front view of a zhijupao (a form of shenyi) with a youren closure
Inner construction of a zhijupao, the upper and lower garment are sewn together