Dr Sun Yat-sen and his supporters on the platform of Zhangjiakou Station, 6 September 1912.
A map of Dr Sun Yat-sen's Plan for National Reconstruction, 1930.
Prospectus of Tuqiang Aeroplane Company, 1918.
The pilot's licence of Young Sen-yet, the founder of the revolutionary air force, obtained in the US, 1916.
The International Development of China written by Dr Sun Yat-sen, with the main focus on material construction.