【Free Online Slots No Deposit Required India】What are the commonly used timing tools? What are the six timing tools in ancient China? Ancient Chinese timing tools: 1. Gui Biao: The "watch" in Gui Biao is a vertical pole. A pole or stone pillar on the ground; "Gui" is a stone slab extending in a horizontal position from the heel of the watch to the north. Whenever the sun turns due south. What are the timing tools? Hourglass,