Flags of the Reorganized National Government of China

During the Second Sino-Japanese war, the invading Japanese established a variety of puppet governments such as the Provisional Government of China and the Reformed Government of China which used the Five Races Under One Union flag even though the legitimate Republic of China had switched to the current day modern flag of the Republic of China.
When the Republic of China-Nanjing was established on 30 March 1940 in Nanjing, Wang Jingwei was slated to take over the previous Japanese-installed governments and centralize the Chinese Nationalists under what they claimed to be the legitimate successor to the Republic of China he demanded to use the modern flag as a means to challenge the authority of the Nationalist government in Chongqing under Chiang Kai-shek and position himself as the rightful successor to Sun Yat-sen.
However, the Japanese preferred the Five-Colored Five Races Under One Union flag. As a compromise, the Japanese suggested adding a triangular yellow pennant...