Background
Zhang Yunshen was born in 785, during the reign of Emperor Dezong.
張允伸逢昌燕忠烈公盧龍
Zhang Yunshen was born in 785, during the reign of Emperor Dezong.
Zhang Yunshen himself also served as an officer in the Lulong army. In 850, when the military governor Zhou Lin died, the soldiers supported Zhang Yunshen to succeed Zhou, and then-reigning Emperor Xuānzong (a great-grandson of Emperor Dezong"s) approved, first making Zhang acting military governor, and then full military governor later in the year. In 868, he was created the Duke of Yan.
When Emperor Yizong declined the assistance, Zhang Yunshen submitted a tribute of rice and salt to supply the troops, and Emperor Yizong issued an edict praising him for doing southern
In 870, Emperor Yizong further bestowed the greater honorific chancellor title of Shizhong (侍中) on Zhang. In 872, Zhang suffered a stroke, and he submitted a petition to yield his responsibilities so that he could attend to his medical condition.
Soon thereafter, Zhang Yunshen died. lieutenant was said that in his 22-year-term as military governor, Zhang was diligent and frugal, and the circuit was peaceful and did not lack anything.