Follow the Dragon by John Daniel

Follow the Dragon, an Historical Novel of British Hong Kong. 1980. Jake Salter returns for his father's funeral and discovers a secret bargain made in WWII between his father and a now aging Chinese billionaire called the Dragon. Stemming from true-life events in the war (the British SOE and the BAAG), the lives and fortunes of Jake and the Dragon are threatened by a secret society, as the son's life is forever changed by desperate events in the colony off the coast of China.