On , he kidnapped Victor Li Tzar-kuoi, son of Li Ka Shing, and on , he kidnapped Walter Kwok, chairman of Sun Hung Kai Properties. He reportedly reaped HK$1.038 billion in ransom money from Li Ka-shing, and HK$600 million for Walter Kwok. Cheung admitted he followed Li Ka-shing, then held him hostage in the Li's own house for three days until the ransom was paid. It was believed at the time that these ransoms would merit an entry into the Guinness Book of World Records.