The unified empire since Qin Dynasty, the first famous figure who betrayed the country and nation, was China's theory of banks.

According to the Bank of China, Emperor Wen of the Western Han Dynasty was a court eunuch. Later, because Emperor Wendi forced BOC to accompany the princess to the Xiongnu, BOC resented the Han Dynasty and turned to Xiongnu, becoming an important counselor of Khan.

The theory of the Bank of China strongly persuaded the Huns to keep their barbaric customs and taught them how to count. With the support of China's banking theory, Khan (son of modu chanyu) of Lao Shangshan boasted in his reply to Wendy's book, and also coerced the envoys of the Han Dynasty, demanding money, goods, gold and silver at every turn, and threatened to step on them when autumn was ripe.

He also tried his best to destroy the Sino-Hungarian relationship, constantly giving advice to the Huns, instigating attacks on the border counties of the Han Dynasty and waging war, so he was the first traitor in the history of China.

When Emperor Wu of the Han Dynasty invaded the Xiongnu in the north, the Bank of China said that he was dying of illness. Before he died, the Bank of China advised the Huns to wage a germ war against the Han army.

Because he found dead horses and sheep in some ponds, the water in these ponds began to be "toxic". Soldiers will be poisoned after eating, ranging from diarrhea to death. Therefore, he suggested that the Xiongnu army, after being cursed by the Xiongnu wizard, bury some dead livestock upstream of some water sources along the marching route of the Han army.

Huo Qubing must have died after eating this polluted water.

This is also the first germ war in the history of the world.