Ruan Wengzhong

Ruan Wengzhong was a historical person during the Qin dynasty, who was recorded to have fought against the Xiongnu on the Great Wall at the border city of Lintao. He was allegedly a 3 meters tall giant. His story was first mentioned by the 3rd century CE writer Gao You in his commentary of the Huainanzi, and later developed in the 6th century Commentary [on the Water Classic]:
Qin Shi Huang, the first Emperor of China, built a giant bronze statue of his likeness, in addition to his more famous Twelve [Metal Colossi], by melting the bronze weapons captured in his victory over the Six Kingdoms. The statue was placed outside the Epang Palace at Xianyang, in modern-day Shaanxi Province.
"Wengzhong" has become a generic term for large scale statues of bronze and stone, and for jade statuettes placed within the coffin of the dead.

In Vietnamese legends

According to Việt Điện U Linh Tập, a 14th-century collection of Vietnamese history and mythologies, Ruan Wengzhong was called Lý Ông Trọng and was a native of Từ Liêm district of Jiaozhi before becoming a Qin official. Lý Ông Trọng is still being worshipped in the Chèm Temple in his native hometown in today's Bắc [Từ Liêm district] of Hanoi.