What are the poetic styles of Gong Zizhen and Wei Yuan?

Gong Zizhen, Wei Yuan and others started this trend. Gong Zizhen advocated criticizing the decadent status quo of the Qing Dynasty, resisting imperialist aggression and reflecting the people's spirit of struggle. His poems express feelings, discuss freely, and contain profound social and historical contents. Wei Yuan is as famous as Gong Zizhen. He emphasized that "it is more convenient to change the past", and his poems have strong patriotic feelings. Poetry style is vigorous and informal, prose is good at discussing, and there are many works that criticize the shortcomings of the times.