Tung.

is a unique economic forest tree species in China, is also one of the four woody oil tree species, at least more than a thousand years of cultivation history. It was not until 1880 that it spread to foreign countries.

, there are six kinds of oil in the world, with the origin of China's three-year and millennium slugs are the most common. Three years of learning the name of oil, also known as light, grow fast, early results, high yield. Generally after planting 3 years on the results, the fruit period can reach twenty or thirty years. Millennium learning famous wood oil, cause and peel wrinkles, so also known as turtle back, meaning long life hundred years old.

oil is a large herring, deciduous trees. The millennium is taller than the three-year-old, with more than 10 meters and a longer tree age. White flowers in spring, male and female. The three-year-old blossomed in April, with white petals, fuchsia stripes on the stems, and the same plant. Both are umbrella flowers, which start in May and mature in October. The oil extracted from the oil seed is called the oil, and the oil extracted from the wood oil seed is called the wood oil, which is slightly inferior in quality to the oil.

oil and wood oil color golden yellow or brownish yellow, are excellent dry oil, shiny. They have impermeable, impermeable, non-transmission, anti-
acid and alkali
, anti-corrosion, heat and cold resistance and other characteristics, so widely used in the industry paint, plastics, electrical appliances, artificial rubber, artificial leather, artificial gasoline, ink and other manufacturing industries.

is China's traditional export commodity, accounting for 70% of the world's total output.