Self-worth refers to the ability of the self, the value of the spirit and life. Self-worth is an inherent existence and a potential value that must be externalized, objectified, and realized as real value through various practical activities. Which of the following is not what we usually say about the realization of self-worth? ["Yang Liwei worked hard to become the first person in China's space.", 'Liu Xiang won the gold medal in the 110-meter hurdle at the Olympic Games, which tied the world record.', 'San Mao in "Wandering in San Mao" gave himself a price of 100 yuan.', 'University graduates start a business after graduation and start their own company.']