The Taixuanjing is a divination guide composed by the Confucian writer Yang Xiong (53 BCE – 18 CE) in the decade prior to the fall of the Western Han dynasty.
The first draft of this work was completed in 2 BCE; during the Jin dynasty, an otherwise unknown person named Fan Wang (范望) salvaged the text and wrote a commentary on it, from which our text survives today.
Like the I Ching, it may be consulted as an oracle by casting yarrow stalks or a six-faced die to generate numbers which define the lines of the tetragram, which is then looked up in the text.
This is clearly intentional as this passage from chapter 8 of the Taixuanjing points out the principle of carrying and place value.
[1] The following Unicode-related documents record the purpose and process of defining specific characters in the Tai Xuan Jing Symbols block: