In which dynasty did Wei Zi become the pronoun of the official position of Zhongshuling and Zhongshuling?

In the Tang Dynasty, the assistant minister of Zhongshu was the right product, and he became the highest prime minister with the matter of writing a chapter in Zhongshu. He often takes the assistant minister under the door and takes Pingzhang as the chief prime minister. Song still has this officer. After Yuanfeng's political reform, the right servant of Shangshu and assistant minister of Zhongshu became the official of Zhongshu, and they were both prime ministers.