So Duke Huan of Qi sent people to Hengshan to buy weapons, and they bought them for ten months.
Yan, Dai and the two countries followed the trend and sent people to buy them.
Qin State learned that the various countries were competing to buy Hengshan State' s weapons, and also sent people to buy them.
At this time, the monarch of Hengshan was very proud,
Seeing that all the nations of the world buy their own weapons,
He ordered the prime minister to increase the price of weapons by more than twenty times.
This lucrative military industry,
Attracting the people of Hengshan to give up farming,
Turned into the military industry to go.
When the world is vying to buy the weapons of Hengshan,
Qi State sent Xi Peng to Zhao State to buy grain.
The price of grain in the State of Zhao is fifteen cents per stone,
Xi Peng bought it at a high price of fifty dollars per stone.
When the nations of the world heard about it, they scrambled to transport food to Qi for sale.
Qi State bought weapons for seventeen months in one go.
I bought food for five months in one go.
After that, the checkpoint was closed and communication with Hengshan was cut off.
Since all the weapons of Hengshan country were sold to foreign countries,
Faced with the pressure of Qi' s army, Hengshan was unable to resist, so he had to surrender.
This is how Guan Zhong used the technique of lightness and weight.
He wo