Cork, de species CORK, difficile ad aptet ad altus-altitudo et summus temperatus climatibus et plerumque crescit in montibus et silvis in altitudine 400-2000 metris in subtropical et temperatum caeli zonis. Cork resources can be found in mountainous areas within the range of 32 to 35 degrees north latitude that meet the geographical and climatic conditions. For example, Portugal, Spain, southern France, the Qinba Mountains in my country, southwestern Henan, and Algeria. Portugal is the world's largest exporter of cork and is known as the “Cork Kingdom” because of its unique Mediterranean climate, which is suitable for the growth of cork raw materials. At the same time, Portugal is one of the earliest countries in the world to develop cork resources, export raw materials, and process products. Algeria's cork production ranks among the top in the world. [2] The Qinba Mountains in Shaanxi Province, my country, also contain rich cork resources, accounting for more than 50% of the country's cork resources. Therefore, Shaanxi is known as the “Cork Capital” in the industry. Relying on this resource advantage, large domestic cork manufacturers are mainly concentrated here. Cork is composed of many flat cells arranged radially. The cell cavity often contains resin and tannin compounds, and the cells are full of air, so cork often has color, light and soft texture, elastic, impermeable, not easily affected by chemicals, and is a poor conductor of electricity, heat and sound . Est composito ex mortuis cellulis in forma XIV facies, quae sunt in hexagonal priss disposita. Et typical cell diametrum est XXX microns et cellula crassitudine est I ad II microns. Ductus inter cellulas sunt. The interval between two adjacent cells is composed of 5 layers, two of which are fibrous, followed by two layers of cork, and a layer of wood in the middle. Sunt plus quam L decies cellulis in singulis cubica centimeter.