What does the unearthed jade turtle represent?

Jade turtle is a divination tool. The jade turtle, which should be related to the season, is a round carving, which is divided into two parts: the carapace and the abdominal carapace. The tortoise is hollow, and the tortoise pattern in the shell is very realistic. The carapace and the carapace are connected by holes and dark grooves. This jade turtle and rectangular jade were unearthed at the same time, reflecting their close relationship and should be used as tools. It should be no problem to say that the jade piece is moderate and square. The dimension with eight numbers as the heaven and earth in the figure is naturally visible. This is undoubtedly a brand-new and fascinating treasure house of ideas. What's particularly interesting is that the jade pieces placed in the tortoise shell are exactly the same as the inscription "Yuan Gui" (The Yellow Emperor's Tactics of Leaving the Army), "Yuan Gui's negative book knocking" (After the Shang Dynasty) and "Big Turtle's negative match" (The Dragon Turtle River Map), which is really incredible.