The pollen of kiwifruit must go when its flowers are in bud, or at the latest when it has just bloomed. By the time it blooms completely, the pollen has lost its activity, artificial pollination can't be completed, and the nutritional value of pollen is obviously reduced. When people take kiwi pollen, they can choose a healthy male spider. When his flower is in bud, they have to pull it out with tweezers or hands. When it splits, they can get yellow pollen.