李四光 Traditional form: 李四光 Pinyin (reading): Lǐ Sìguāng Definitions: Li Siguang (1889-1971), Mongol-born, Japanese-trained geologist, prominent in early PRC oil exploration Characters: 李 - plum; luggage; surname 四 - four 光 - light; bright, brilliant; only, merely Traditional characters: 李 - plum; luggage; surname 四 - four 光 - light; bright, brilliant; only, merely