Rare earth elements are China's rich mineral resources, proven reserves rank first in the world, because of its use in electronics, petrochemicals, metallurgy, machinery and other countries, so it is valued by many countries, have developed cooperative relations with China, and now China has long realized the importance of this element.
Of course, in addition to rare earth elements, in fact, after the Industrial Revolution, another very common thing, but also became a tight commodity at that time, especially by the love of Western countries, this substance is tung oil, said tung oil, may now have many families have been uncommon, but after the early industrial revolution, tung oil as an important resource reserve, has always been valued by Western countries, and later continued until the war of resistance.
At that time, China was the world's largest exporter of tung oil, because China's own industrial construction was not high at that time, so it used tung oil exports in exchange for western powers to aid China, for example, after Mr. Hu Shi became the us ambassador in 1938, he negotiated with the United States to use 220,000 tons of tung oil as collateral in exchange for a loan of 25 million US dollars from the United States.
In fact, the reason for this is because such a thing as tung oil is still relatively common in China, because the length of this plant is very harsh, so the United States, Europe and other developed countries are rare, and Japan as an island country, its growth environment is also very limited, but in China is not the same, although this plant production can not be said to be all over the mountains, but basically very common. And very early people found that tung oil can prevent the rust of iron utensils, so in the early years, every household is prepared to remove rust from agricultural tools, not only so tung oil also has a certain medicinal value, but can only be used externally, can not be taken internally, tung oil is very toxic.
And with the acceleration of the industrial process, tung oil to buildings, machinery, weapons, vehicles and ships and other waterproof and anti-corrosion has a very significant effect, so it has become a well-deserved strategic resources, especially in the late Qing Dynasty, after the Western countries knocked on the door of China, it is even more covetous of China's tung oil resources, after the establishment of the Republic of China, Western countries and China to carry out trade, but also the use of a variety of scarce resources, and tung oil is the most important of them, the Japanese army to the late stage of the War of Resistance, but also in the occupied areas to loot tung oil resources.
However, it is said that there have also been jokes, during the war of aggression against China, the Japanese army once used tung oil to stir-fry vegetables resulted in poisoning incidents, in fact, in China's very early medical works, there are records of tung oil, such as the "Nichiwazi Materia Medica" recorded, after drinking tung oil will lead to vomiting, it is said that the use of tung oil stir-frying, fried after the aroma is fragrant, making people salivate, so the usual use of tung oil also needs special attention.
Of course, with the continuous strength of China, coupled with the development of economic construction, China's demand for tung oil is also increasing, as an important resource in industry, the future use of tung oil will be more extensive, then will inevitably reduce exports, I am afraid that at that time, many countries will come to China, hoping to give a little more tung oil resources!