Once, I heard a story that I got a reward of $10000 for drawing only one line and made a huge fortune by relying on technical knowledge. Now, I know that, in fact, there is the second half of the story, that is, to repay the benefactor for giving up to the peak of his career. If I were telling this story, I would never abandon the second half and tell it in full. In this complete story, the above shows that knowledge can bring huge wealth to life, while the following shows gratitude. Gratitud...