How should I harvest the skin of Eucommia?

The bark can only be peeled off after growing for more than 15 years after planting. Generally in April to June the tree growth period, the bark is easy to peel off. Bark harvesting methods are mainly: ① partial peeling. In the trunk from the ground 10 to 20 centimeters above the part, staggered peeling around the trunk area 1/4 to 1/3 of the bark; ② large area ring barking. In the trunk below the branch, shallow cut a circle, and then in the trunk 10 cm from the ground in a circle, do not damage the xylem, and then between the two circles longitudinal cut a knife, along the silk seam will be gently peeled off the bark. Strip the bark with boiling water after soaking spread flat, overlapping layers of pressure, about 1 week, take out the sun, scrape off the rough skin.