Each part of the different programs in this International Scheme, is but a rough sketch or a general policy produced from a layman's thought with very limited materials at his disposal. So alterations and changes will have to be made after scientific investigation and detailed survey. For instance, in regard to the projected Great Northern Port, which is to be situated between the mouths of the Tsingho and the Lwanho, the writer thought that the entrance of the harbor should be at the eastern side of the port but from actual survey by technical engineers, it is found that the entrance of the harbor should be at the western side of the port instead. So I crave great indulgence on the part of experts and specialists.
I wish to thank Dr. Monlin Chiang, Mr. David Yui, Dr. Y. Y. Tsu, Mr. T. Z. Koo, and Dr. John Y. Lee, who have given me great assistance in reading over the manuscripts with me.
Sun yat-sen.
Canton, April 25, 1921.
