The canton (upper corner on the hoist side) originated from the “Blue Sky with a White Sun flag” (青天白日旗; qīngtiān báirì qí) designed by Lu Haodong, a martyr of the Xinhai Revolution. He presented his design to represent the revolutionary army at the inauguration of the Society for Regenerating China, an anti-Qing society in Hong Kong, on 21 February 1895. This design was later adopted as the KMT party flag and the Coat of Arms of the Republic of China. The “red Earth” portion was added by Sun Yat-sen in the winter of 1906, bringing the flag to its modern form. According to George Yeo, the Foreign Minister of Singapore, in those days, the Blue Sky with a White Sun flag was sewn in the Sun Yat Sen Nanyang Memorial Hall (formerly known as the “Sun Yat Sen Villa”) in Singapore by Teo Eng Hock and his wife. The drafted design had ten stripes with the flag of the Kuomintang in the canton that resembled the flags of the United States, Malaysia and Liberia.
Chinese flag coloring page, They'll love it (and you just might too!)