France's Jolly Bellang was a small handyman when he was 13 years old. When ironing, he accidentally knocked over the oil lamp and spilled kerosene on the clothes. The employer asked him to compensate, but the child had no money and had to promise to work for one year Since then, the child hangs the stained clothes on the bed as a warning. One day, he suddenly found that the place where the clothes were soaked with kerosene was not only dirty, but also the original stains were removed. This discovery made him immediately Liang. He passed countless trials and finally developed a dry cleaning agent. One year later, he opened a dry cleaning shop, the business became bigger and bigger, and finally became the world's dry cleaning king. What does this text mean? ['When a person overturns the lamp of fate and it is dark before his eyes, do not extinguish the lamp of the soul.', 'Little wisdom keeps people busy, big wisdom keeps people calm.', 'There is a bright light in my heart, and there is action on the soles of my feet.', 'How D. Jolly Bellang invented the dry cleaner.']