The front of the wooden tablet is divided into two parts: the content of the upper and middle section is "Occupation of the Divine Tortoise". The upper paragraph is the explanatory text, and the middle paragraph is painted with the image of the tortoise. "The Divine Tortoise" mainly uses the divine tortoise to fortune the direction and time of the lost property and the name of the thief. The next paragraph is "Liujia Zhanyu", which is used to predict the time of rainfall, but there is no explanatory text. The specific method is yet to be studied. The reverse side of the wooden tablet is "Bo Ju Zhan". The upper and lower pictures are divided into five paragraphs, each with ten lines. The operation of "Bo Ju Zhan" is very simple, as long as you find the position of the stems on the graph on the day of Zhan Jian, you can get the answers to the questions asked. This wooden tablet records several practical divination techniques used by the Han people, and is extremely precious ancient mathematics materials.