The architecture of the Cai Family Residence reveals a specific anxiety: the fear that great wealth attracts great danger. Standing in Liuke Village, the compound resembles a fortress as much as a home. The brothers who built it in 1934, led by rubber magnate Cai Jiasen, returned from Indonesia with a fortune and a wariness of local instability. Consequently, they designed a domestic space prepared for siege. High perimeter walls enclose the structure, and gun slots puncture the upper levels, offering sightlines for rifles alongside the decorative cornices.

The building physically manifests the complex identity of the 'Nanyang' returnee. It represents a collision of worlds. Roman columns support Chinese timber roofs, and Islamic geometric patterns tile the floors beneath traditional ancestral shrines. The materials themselves tell a story of sheer logistical will: the cement, steel, and colored glass were not sourced locally but shipped across the ocean, then carried up the Wanquan River to this quiet corner of Hainan.

Yet, this fortress could not hold back history. The family occupied their masterpiece for only three years. When the Japanese invaded in 1937, the Cai brothers fled back to Indonesia, leaving the halls to a succession of uninvited tenants. The residence served as a headquarters for guerilla fighters, a Japanese garrison, a Nationalist stronghold, and later, a communal granary where the village stored its harvest. The 'Jiyang Tang' hall, once reserved for solemn ancestral rites, eventually echoed with the noise of a public canteen. Today, the residence stands as a survivor of the century it witnessed, a striking shell preserving the memory of a family that conquered the seas but could not hold their ground against the tides of war.