What happened during the 1927 shanghai massacre?

The following happened during the 1927 Shanghai Massacre:

During this massacre, the military troops of the Nationalist party  violently suppressed the China's communist party. In many of China’s parts, there were violent suppression and differences arising among the left-wing and right-wing factions.

Such suppression resulted in the Chinese Civil War, where the Guangzhou uprising failed and communist got diminished wherein, they couldn’t launch their major urban offensive. This is commonly called as the April 12 Purge. In memory, there is a wooden sculpture in Shanghai that depicts the number of murders in the massacre.