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What is the big super factory in Sofia?

Sophia has seven large super factories all over the country. Sophia's large-scale factories are located in Zengcheng, a production base in South China, Jiashan, a production base in East China, Langfang, Chengdu, Huanggang, Lankao, Sofia, He Hua, doors and windows, and Qiqihar, which basically realize the nationwide production capacity layout.