According to Chinese myths, initially, the Universe was a formless chaos. Over time, a cosmic egg emerged from the chaos, from which Pan Gu later appeared. It is believed that with a swing of his enormous axe, Pan Gu separated Yin from Yang and created the murky part – the earth (Yin) and the bright part – the sky (Yang). To prevent Yin and Yang from merging, Pan Gu pushed the sky away from the earth every day. When Pan Gu was sure that the earth and sky would not merge and no longer needed his support, he died. Pan Gu's breath became the wind, his voice – thunder, his left eye – the sun, his right eye – the moon. His hands and feet formed the four cardinal directions, his body – the earth, rivers arose from his blood, roads from his veins, stars, plants, and trees from his hair, metal from his teeth and bones, and jade from his bone marrow.