The (945) Old Book of Tang biography of Li Xun (tr. Davidson 1950:247) says this occurred on a hot summer day and the emperor's ruyi present was made from "heat-repelling rhinoceros horn", which is believed to be cooling in traditional Chinese medicine.
The (945) Old Book of Tang biography of Li Xun (tr. Davidson 1950:247) states that this event took place on a hot summer day, and the emperor's gift was made from "heat-repelling rhinoceros horn," which is believed to be cooling in traditional Chinese medicine.