Liu had worked covertly as a revolutionary in 'White' ([[KMT]]-controlled) areas of [[China]] in the 1930s and later built up [[Chinese Communist Party]] cells in areas occupied by [[Japan]]. | Liu had worked covertly as a revolutionary in 'White' ([[KMT]]-controlled) areas of [[China]] in the 1930s and later built up [[Chinese Communist Party]] cells in areas occupied by [[Japan]]. |