Wu xing (Chinese: 五行; pinyin: Wǔxíng) is a Warring States period text ascribed to Zisi, known mainly due to the Mawangdui (1973, sealed 168 BCE) and Guodian (1993, sealed about 300 BCE) discoveries. Relationship between the two versions of the text remains debated. Unlike the Guodian version, written on bamboo strips, the Mawangdui "Wu xing" is written on silk and contains both the main text (jing) identical to that of the Guodian and the explanation (shuo).