The "Five-Colored Flag" of the Republic of China on a Japanese label dated 1912-1928

The "Five-Colored Flag" was used as a national flag of the Republic of China from the inception of the Republic in 1912 until the demise of the warlord government in 1928.

The "Five-Colored Flag" Used mainly in Shanghai and eastern parts of northern China until 1928. This flag was widely flown even before the founding of the Republic of China by Chinese on the eastern coast and garnered the greatest respect at the founding of the ROC. Stripes represent the five great races in China's history, according to Dr. Sun Yat-sen: red for Han Chinese, yellow to represent Manchus, blue as Mongols, white for both Huis and Uyghurs, and black for Tibetans. 

http://en.wikipedia.org/wiki/List_of_Chinese_flags

Blue Sky, White Sun, and a Wholly Red Earth

The "Blue Sky with a White Sun flag" was designed by Lu Hao-tung in 1895 and is used to this day as the naval jack of the Republic as well as the flag of the Kuomintang (KMT).

The Naval Jack of the Republic of China since 1928 (canton of the Flag of the Republic of China), now used on Taiwan.

http://en.wikipedia.org/wiki/Flag_of_the_Republic_of_China

On the back of thr bomb you can see the flag
of the Wuchang uprising - army flag of the Republic of China.
The flag of the Wuchang uprising of October 10, 1911,
subsequently used as the flag of the army of the
 Republic of China, ca. 1913–28.

The Iron blood 18-star flag of
 the Wuchang Uprising