Why is Ai Qing "the representative of July school in poetry?"

Ai Qing, formerly known as Jiang Haicheng, was born in Jinhua, Zhejiang, and was a representative poet of the July Poetry School. "July School" is a literary school born in War of Resistance against Japanese Aggression, and its genre character is determined by its relationship with reality. The mutual promotion of national salvation and enlightenment is also the spiritual pursuit of the July School. With the change of the Anti-Japanese War, the overall creative style of the July School has also changed obviously, and it tends to be depressed and miserable in the later period. Ai Qing published a large number of literary theories and critical articles in July, Hope Magazine, July Poetry and July Literary Works, introduced and commented on the works of a large number of progressive young writers in Kuomintang-controlled areas and writers in liberated areas, and naturally became the representative of the July School.