1 As we all know, Edison is called the king of invention. But there is a lot of black history behind such an inventor. He was not the first person to invent the light bulb, but he improved it and registered a patent. The most striking thing is the feud between him and his friend Tesla, an engineer in his company, who promised to offer a reward of 50,000 pounds to solve the operation problem of DC. Later, after Trass solved it, he got the method but reneged on his word and didn't give Trass money.
Later, he has been using various means to discredit and suppress the fact that Trass invented alternating current, exaggerating the harm of alternating current through the media to eliminate his biggest competitor, and privately supporting prisons to punish prisoners with alternating current to make people hate alternating current, so as to eliminate commercial competition.
2. Cai Lun was born in Guiyang County in the Eastern Han Dynasty. Entered the palace at the age of fifteen. He has been a eunuch since he was a child, waiting for lang in Huangmen. He experienced four emperors and two queens in his life and became a "tumbler" in politics. All this is inseparable from his intelligence, sense of language and good at choosing sides.
In 82 AD, Cai Lun was involved in the harem struggle between Queen Dou and Song Guiren. Dou Taihou ordered Cai Lun to write a letter, framing the Song nobles as "the art of being tired of winning". Song Guiren argued and committed suicide by taking poison in prison. When the noble Song died, her son Liu Qing, as a prince, was also implicated. The emperor was demoted to the king of Qinghe, and his son was a prince.
In 88 AD, Emperor Liu Zhao ascended the throne, and Empress Dou became Dou Taihou. Cai Lun, also named Zhong Changshi, is a very important minister. In 65438, Emperor Liu Hu came to power. Liu Hu is the son of Qing Liu, the ancient enemy of Qinghe, and the grandson of Song Guiren. Cai Lun's glory is over. Cai Lun worried that Emperor Han would liquidate himself and commit suicide.