Not only his success impresses me, but he can also create a sound recorder even he was deaf. He had made a lot of mistakes and had failed more than 1000 times, but he was determined to work diligently. For example, he slept only 4-5 hours per day. This shows a lot of patience and his true intentions. Despite various obstacles, he had always said that he saw the mistakes as a lesson rather than an obstacle that caused him to faint.