The 1st AFAMF Zhong 28 Yi was China’s development of the famous Soviet Polikarpov I-15bis fighter. Only thirty examples were produced between 1937 and 1944 and allegedly saw combat against the Japanese.
The 1st AFAMF Hummingbird was designed by Major General Zhu Jiaren and was China’s first helicopter. No serial production commenced, but two prototypes were produced and both were lost shortly after.
One of the most common helmets used by the Chinese during the Second Sino-Japanese War were imported M1935 Stahlhelms. However prior to that in 1932, the Chinese attempted to produce their own Stahlhelm allegedly based off of the World War I M1916 Stahlhelm.