I think the answer is A like the first one.
Answer:
I'm not a 100% sure but I think it's C
A and D i think. As they were paid the same as white soldiers i do believe, and many did win high rewards.
C. Slave labor. Hope it helps!
He order the building the Great Wall and standardized system of weights and measures. He also ended the feudal state system and reorganized China into states and counties under a central government. He connected all the walls along the northern border. He also supported the irrigation system along the Yangtze Valley, helping to support the Chinese people. Additionally, Confucian thought that a country can be successfully governed only if the government has the support of the people.