How did this Vietnamese man explain the french imperialism in Indochina in 1867

The Vietnamese man explains the French imperialism in Indochina describing how the French attacked Indochina with their powerful weapons of war which caused discord. He explains that they are weak against the French because the Indochina commanders and soldiers have been conquered. He describes how the French have immense warships, filled with soldiers and armed with huge cannons concluding that no one can resist them. He notes that the French go where they want, as the strongest ramparts fall before them.