The very first story in the 500 volumes of the “Extensive Records of the Taiping Era” is about Laozi.
It is said that Laozi had a servant named Xu Jia who had served him for over 200 years. But Xu Jia was not happy. He had not received his pay of 100 qian per day since the day he started work. It had been over 200 years, and every day he waited for his master to pay him. Every night before going to bed, he would calculate and tally the outstanding amount owed to him.