2. After suffering from castration, Sima Qian overcame his illness, made a fuss in history and persisted. Finally, Historical Records was circulated.
In order to invent the electric light, Edison tried hundreds of materials. Because he didn't give up, he finally found the most suitable metal tungsten for filament, which brought light to mankind.
4. Mao Zedong, Sun Yat-sen, Napoleon, Washington, the people who have made great achievements in history are persistent people, so there are countless people.