Match the achievement with the dynasty that accomplished it.

crossbow

wheelbarrow

Great Wall of China

writing system

Qin dynasty

Han dynasty

Zhou dynasty

Shang dynasty

The Crossbow appeared during the Zhou dynasty invented by Mr. Ch'in of Ch'u around 700 BC; the Wheelbarrow was invented by the prime minister of Shu Han, Zhuge Liang around the "Three Kingdoms" in China at the end of the Han dynasty; the Great Wall of China was built during the era of the first emperor of China Qin Shi Huang, founder of the Qin dynasty; and the writing system was first invented probably simultaneously by both the Olmecs and Mayas around the Gulf of Mexico in "Mesoamerica", and in China with the Shang dynasty.

Answer: He is right, above me