On June 18, 1928, the Sixth National Congress of the Communist Party of China was convened in Moscow. On June 18, 1928, with the help of the Communist International, the Sixth National Congress of the Communist Party of China was convened in Moscow. The Sixth National Congress of the Communist Party of China was convened in Moscow. On June 18, 1928, with the help of the Communist International, the Sixth National Congress of the Communist Party of China was convened in Moscow. The Sixth National Congress of the Communist Party of China was convened in Moscow. The Sixth National Congress of the Communist Party of China was convened in Moscow. The Sixth National Congress of the Communist Party of China was held in Moscow. The Sixth National Congress of the Communist Party of China was convened in Moscow, and the Sixth National Congress of the Communist Party of China was held in Moscow. On June 18, 192