Why did Zhang Qian come out of the jam?

The reason why Zhang Qian went out of the jam was because during the period of Emperor Wu of the Han Dynasty, the Xiongnu in the north frequently interfered with the north. Emperor Wudi of the Han Dynasty was very annoyed with his perennial conquests, and he could not fight them. They ride horses very well. He wanted to send someone to today's Afghanistan to find reinforcements to fight the Xiongnu, and if he wanted to go to Afghanistan, he would have to pass through the Xiongnu territory in the north, so no one dared to go, just when Zhang Qian was unlucky, he was called. Zhang Qian was caught by the Xiongnu the first time he went, and was imprisoned for three years, he took advantage of their lack of attention and ran away, all the way to the west to India, and when he arrived in India, he found that there were actually Sichuan things in that place, Shubu, and Bamboo. He asked the Indians where they got it, and they told him how to get back to Sichuan, and he went to tell Emperor Wu of Han. Emperor Wu of Han was happy to hear this, thinking that there was finally a way to clean up the Xiongnu, so he sent Zhang Qian with some troops from Yunnan to the Erhai side of Dali, where there were strong Kunming tribes on the Erhai Sea to block the past. The Han Dynasty army wine and them fought a war, can't fight ah, the northerners are not good at swimming, kunming people soak in the water every day. After a few months, the grain and grass were almost gone, and the army could no longer fight again due to illness. So Zhang Qian took the soldiers back to tell Emperor Wu of Han, and Emperor Wu of Han was angry, so some ministers suggested that a lake be dug artificially in Beijing, and several large boats were built for the soldiers to practice water, because it was against the Kunming people, so it was named Kunming Lake, which is now there. Once again, Dali conquered the Kunming clan, and Zhang Qian also went to the rescue troops who moved to Afghanistan to fight off the Xiongnu, so Zhang Qian came out of the jam. History called this time as the Han Xi Lou ship.