City: Founder of a Famous Family

When you work out, you only have fifteen minutes of physical strength, so you use twice as much, and you persist for an hour. In the sprint competition, your speed is 100 meters in 12 seconds, you double it and it ends in six seconds. You are a piano beginner, you use it twice and you become a master in a month. You won 50 million in the lottery, you doubled it, and you got 500 million. Since the doubling of the famous system, Jiang Xiaobai's food has become more and more delicious. Eventually he became the founder of a famous family with profound knowledge and wealth. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.