Siu Sai Wan was originally an intelligence gathering centre for the United Kingdom. In 1947, Australia, Canada, New Zealand, United Kingdom and United States signed an agreement to jointly pursue the gathering of intelligence. The British Armed Forces then set up an intelligence gathering centre in Siu Sai Wan, one of the largest in the Far East, to monitor wireless communications from Taiwan (ROC) to China (PRC). In 1985, shortly after the handover of Hong Kong to China was agreed, the centre was dismantled.