Specifically the new party officially disavowed any ambition to promote "national struggle" and declared its intention to use legal means to "affirm democratic politics", establish "reasonable economic organization" and reform "defects in the social institutions".

The revised charter characterized the party as one to work toward the political freedom and interests of workers, peasants, the urban proletariat, and all similarly oppressed.

On 7 July 1927 it put forward a "Statement of Recommendations", given to Prime Minister Hamaguchi Osachi, that demanded local autonomy for the island and urged freedom of speech.

The party successfully created international pressure by filing complaints to the League of Nations (of which Japan remained a member until the early 1930s), which then sent a representative to investigate.

[4] As civilian rule gave way to a new, harsher phase of all-consuming militarism in Taiwan and elsewhere in the Japanese colonies, the fate of the party was sealed.

Ironically the result was essentially as Peng Hua-ying had predicted in his objection to Chiang's more radical vision: As soon as the fourth party congress passed the revised charter, the authorities proceeded to ban the organization.

In its statement the authorities accused "leftist, nationalist members" of controlling the party and secretly working on independence for the colony, as well as alerting the international community of Japan's use of chemical warfare in suppressing the Musha Rebellion of 1930.