Introduction to the Old Camera Manufacturing Shop: The old camera manufacturing shop has various old cameras. The shop owner is Mr. Chen Haiwen, a representative of Shanghai-style photography. He used the Seagull 4A-109, a domestic camera, to witness that era in Shanghai. This gave rise to the simplest camera complex deep in my memory. The classic domestic double-lens reflex camera: Seagull 4A-109 was manually assembled in the alley of Tianzifang, recreating that glorious history.