Boil water.
Clean cleaver's shoots and put them into a pot.
Pour boiling water into the pot to make a cleaver's shoots infusion and leave until cooled down.
Wash sorrel and knotweed, cut the avocado into half, and scoop it out.
Put sorrel, avocado, and knotweed into a blender.
Drain the cleaver's shoots and add infused water into the blender.
Blend until all ingredients are smooth, and serve in cups or glasses.