Taiyi Shengshui (Chinese: 太一生水; Pinyin: Tàiyī Shēngshuǐ; literally "The Great One Gave Birth to Water") was written about 300 BC during the Warring States period. It is a Taoist creation myth. The opening lines are: 大一生水 水反輔大一， 是以成天。[地] 天地...也， 是以成神明。 神明復相輔也， 是以成陰陽。 The Great One Birthed Water. Water returned and assisted "Taiyi", in this way developing heaven [and Earth?]. Heaven and earth [repeatedly mutually assisted?] too, in this way developing the "Bright Gods". The "Bright Gods" repeatedly mutually assisted too, in this way developing Yin and Yang [Darkness and light].