Who was the calligrapher who ordered An Lushan to counterinsurgency in Pingyuan County of Tang Dynasty?

Yan Zhenqing

Yang excluded Yan Zhenqing, and in the 12th year of Tianbao (AD 753), Yan Zhenqing was transferred from Beijing and became the magistrate of the Plain.

The Book of the New Tang Dynasty, Volume 153, Biography 78: Consultant for the Imperial History of the Temple Relocation. When Moon Hee, an imperial envoy, built Zhong You and Song Hun together with personal resentment, he was exiled to Hezhou. Zhenqing said, "Why should you be angry for a while and endanger Song Jing?" Yang, the prime minister, hated it. He satirized Cheng and Jiang Lie for interviewing judges, and then transferred to Yuan Wailang of the Armed Forces Department. The country of loyalty and righteousness is finally leaving, but it is out of the plain.