National heroes are: people who have made outstanding contributions in the struggle against the invasion and oppression of foreign nations, including those who are not afraid of violence and sacrifice in the struggle against them. According to the above definitions, which of the following is national hero:. ['Song Jiang, a famous peasant uprising leader in the Song Dynasty.', 'Lin zexu, a famous historical figure who once ordered "selling cigarettes from humen".', 'Li Siguang, a famous scientist who picked the "poor oil country hat" for China.', 'Lei Feng, a good soldier who serves the people wholeheartedly.']