When the host proposes a toast, the guest should use the tip of his ring finger to dip a little to sprinkle in the air, mid-air and to the ground for three times as a sign of offer to heaven, earth and ancestors. After that, you should take a sip of wine, the host will refill it, you take another sip and your host will refill it the second time. A succession of this action will be repeated for three times till you are asked to bottom up the whole glass.