What is the origin of the 28-star suitcase of Hubei Provincial Museum?

1978 In the spring, this suitcase was unearthed in the tomb of Zeng Houyi in Leigudun, Suixian County, Hubei Province (now Suizhou), together with a number of national treasure cultural relics such as Zeng Houyi's chimes. At the same time, five suitcases were unearthed in the tomb of Zeng Houyi. They are the same style and similar in size. The box body and box cover are carved from a whole piece of wood and painted on the outside. On the cover of one of the lacquer boxes (later numbered E 66), there is a colorful astronomical picture, which is a picture of 28 stars. "The discovery of the 28-star sky chart proves by irrefutable facts that it is the earliest 28-star sky chart ever seen in the world. Moreover, because it was depicted as a decorative pattern on a box for clothes, it also showed that this astronomical knowledge was quite popular at that time.