These letters come from the famous Rockefeller family. The elder Rockefeller was already extremely wealthy at that time. So, how did this father educate his "second-generation rich" son through every little thing in life? On November 17, 1887, 13-year-old John Davidson Rockefeller Jr. Began to write to his father, 48-year-old John Davidson Rockefeller Sr., At home in New York, beginning a 50-year history of correspondence between father and son. These letters are published in China for the first time and are very precious. From them, we can get a glimpse of the old Rockefeller's attitude towards business and wealth.