The phloem of the tree has not been severely damaged, and sieve tubes can still be used to provide nutrients to the tree.

The phloem of angiosperms consists of sieve tubes, companion cells, and sieve elements. It is composed of bark fibers and phloem parenchyma cells and is located between the bark and cambium. It is possible that only the outer bark has been peeled off, and the bark of Eucommia trees is generally peeled using a partial peeling method, and the bark will not be completely peeled off.

The following is from Baidu Encyclopedia: /view/331785.html

Bark, in a broad sense, refers to all tissues other than the vascular cambium of the stem (old trunk). The protective structure around the trunk, which is the bark that can be peeled off the trunk when the wood is harvested or processed. From the inside to the outside, it includes phloem, cortex, periderm that has accumulated multiple times, and all dead tissue except the cork layer. All tissues of woody plants except the cambium. The inner layer is softer and is produced by the outward division of cambial cells. This layer includes the phloem, which conducts nutrients. The outer layer is mostly dead tissue, produced by the cork cambium. As the cambium continues to move, the old part of the bark's outer layer will continue to fall off. This layer is called the peeling layer. The bark is usually thinner than the xylem of the stem. Both bark and xylem are produced by the cambium layer.

In addition to protecting against cold, heat and diseases and insect pests, the bark’s main function is to transport nutrients. There is a layer of tissue called phloem in the skin of the plant. The phloem is lined with tubes. The nutrients produced by the leaves through photosynthesis are transported to the roots and other organs through it. Some trees are hollow in the middle, but they are still full of vitality because the phloem at the edges exists and can transport nutrients. If the phloem is damaged and the bark is peeled off over a large area, new phloem will not have time to grow, and the roots will die due to lack of organic nutrients.