Chief changes lives of rural chinese
Maybe there were no cures, vaccines, or antibodies at the time. Medicine was never completely discovered for centuries to come, which is why the Black Plague occurred during the medieval/Middle Ages.
Answer:
"Origins of the Terms Yin and Yang. The earliest Chinese characters for yin and yang are found in inscriptions made on “oracle bones” (skeletal remains of various animals used in ancient Chinese divination practices at least as early as the 14th century B.C.E.).'
Explanation:
