The loop

回环

回环，指循环往复;环绕。语出《关尹子·四符》:“五行之运，因精有魂，因魂有神，因神有意，因意有魄，因魄有精，五者回环不已。”回环可构建事物间相互依存、相互制约或相互对立的关系。

The Loop, meaning the circulation and encircling, quoted from " The movement of the five elements, because of the vigour there is a soul, because of the soul there is a spirit, because of the spirit there is an intention, because of the intention there is a prana, because of the prana there is an vigour, and the five are back and forth " (Guan Yin Zi – Si Fu). With the Loop it can be constructed the relationship of interdependence, mutual constraints and mutual antagonism among things.