During the Anti-Japanese War, bristles played an important role in life at that time. Bristles can be made into brushes, and brushes made of bristles (including long-haired brushes) are not easy to bend, twist and break, and can be brushed freely when painting, and are resistant to high temperature, so they are extremely widely used.
At the beginning of the Anti-Japanese War, the ports along the coast of Chinese mainland fell one after another. Inland land traffic, including the Yunnan-Myanmar Highway and the Yunnan-Vietnam Highway, has also been cut off one after another, and China bristles can't be shipped out, resulting in soaring world prices.
In wartime military industry, from painting warships, planes and various military vehicles to cleaning the barrels and barrels of machine guns and cannons, bristles are undoubtedly the best tool to protect weapons from damage. Therefore, all countries participating in the war spray paint their weapons with bristles, so as not to let those weapons go to the front with bare steel bodies. As a result, the output of bristles in China has increased dramatically.
Extended data:
Bristles are important strategic materials for China to compensate loans or materials from the Soviet Union, Britain and the United States. After the outbreak of the Anti-Japanese War, China urgently needed a lot of arms and foreign exchange, so the government decided to monopolize more than ten kinds of traditional export materials-tungsten, antimony, tin, silk, tea, tung oil, wool, bristles, etc., which was called "barter to pay off debts" in history.
From 1938 to 1945, the national government implemented the policy of unified purchase and marketing for export materials such as bristles for almost eight years. During this period, more than 80,000 shares of bristles were purchased, valued at 7.095 billion yuan.
Among them, the export of bristles was an important source of foreign exchange income in wartime in China. During the nine years from 1937 to 1945, China's foreign exchange income from exporting bristles reached US$ 30 million. 1940, the United States lent China only $25 million in tungsten deposits. 194 1 year, the national government issued 30-year gold bonds to build the Burma Road, the most important land passage in China during the war, with only100000 USD.
The United States has always accounted for more than 30% of the annual output of bristles in China. During World War II, the demand in the United States was even greater. There are 400 or 500 brush factories in the United States, and even prisons in every state have their own brush factories. Almost all the raw materials used to make brushes come from China. In World War II, the American government not only listed bristles as strategic materials, but even regarded bristles as one of the factors that decided the outcome of the war.
References:
Baidu encyclopedia-bristle people's network-biodiversity from bristle