Revitalizing the building did not simply mean moving commercial ventures into an old house. The team reorganized the space around Koo and his family's stories. His wife's fondness for qipao and jewelry, for example, inspired the introduction of clothing and jewelry offerings, as well as period-costume photography experiences.

　　Jin said that by weaving the stories of historical figures into products and creating distinctive offerings, businesses can add narrative appeal and value while fostering a healthier commercial cycle.

　　The team has also continued to explore new ways to enrich the visitor experience. In April this year, nearly 100 students from primary schools, middle schools and universities visited the residence, recreating scenes from the 1919 Paris Peace Conference through dramatized performances, where Koo fought to uphold national sovereignty.

　　During the May Day holiday, interactive performances at the residence drew more than 300 visits in a single day. In June, the protection and utilization of Koo's former residence in the Wudadao modern architectural complex was named one of Tianjin's outstanding cases of cultural heritage building protection and utilization for 2026.

　　A tourist surnamed Ma from Beijing recalled that during previous visits to the Five Great Avenues, some Western-style buildings could only be viewed from outside.

　　"This time, I found that quite a few former residences of notable figures are open to visitors. You can also have coffee, dress up in period costumes and take photos. The experience feels much richer," she said.

　　Leaving Hebei Road and walking along the neighborhood lanes toward Anshan Road, visitors come upon an old building with exposed brick walls and a red-tiled roof. Built in 1915, it is Zhangyuan, or Zhang's Garden.