The two-story green brick house at No. 58 Longhuan Li presents a face of ordinary domesticity, characteristic of the homes built by returning overseas Chinese in the early 20th century. Constructed in 1914 by Gong Welfare, a merchant returning from America, the structure follows a traditional Pearl River Delta layout: a central hall anchored by four flanking bedrooms, two kitchens, and a small courtyard designed to pull light and air into the home’s center. The architecture suggests a life of stability and mercantile order, yet it served as the incubator for one of the most lethal and enigmatic figures in the history of China's intelligence wars.

Within these 100 square meters, Gong Changrong—born into poverty and adopted into this family—transformed from a farmer’s son into the man later feared by Nationalist intelligence as the "Old Guangdong." The village of Shuinan maintained a fierce local custom of martial arts training. In this compact courtyard, long before he handled the dual Mausers that made him a legend in Shanghai’s alleyways, Gong cultivated the physical discipline and tactical awareness that would eventually define his role as the head of the Central Special Branch’s "Red Squad."

The domestic intimacy of the living quarters stands in sharp relief against the violence of his later vocation. While this house offered the potential for a quiet existence—he attended school nearby and married his neighbor Zhang Meixiang here—it became the point of departure for a life lived entirely in the shadows. When the revolution demanded the protection of the Party Central Committee, Gong traded the predictable rhythms of Longhuan Li for the volatile streets of 1930s Shanghai. The skills nurtured in this quiet corner of Jiangmen allowed him to eliminate traitors and protect leadership with a precision that baffled his enemies, until his betrayal and execution by strangulation in Nanjing at age 32.

Today, the restored structure preserves the physical memory of a man whose professional survival depended on erasure. The sunlight filtering into the open-air atrium illuminates the origin story of a shadow warrior, grounding the mythical "double-gun general" in the tangible reality of home, family, and the heavy grey bricks of his youth.