Who art name was a Chinese general and martial artist best known for countering the "wokou" pirates during the reign of the then known  Empire of the Great Ming?
Yu Dayou Yu Dayou (1503–1579), courtesy name Zhifu, art name Xujiang, was a Chinese general and martial artist best known for countering the "wokou" pirates along China's southeastern coast during the reign of the Jiajing Emperor in the Ming dynasty.
Great Wall of China The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe. Several walls were being built as early as the 7th century BC; these, later joined together and made bigger and stronger, are now collectively referred to as the Great Wall. Especially famous is the wall built 220–206 BC by Qin Shi Huang, the first Emperor of China. Little of that wall remains. Since then, the Great Wall has been rebuilt, maintained, and enhanced; the majority of the existing wall is from the Ming Dynasty (1368–1644).