A dialogue joke between a person and a calculator

After Ren Wei and Sun Shao, the official position was Shao Qing, a teacher. He was very old, but he was not promoted to Zhengqing. On one occasion, Gaudi summoned

He asked, "Why is Chen so old?"

Sun Shao replied:

"Although I am old, I am still young."

So Gaudi promoted him to be a teacher Zhengqing.