What allusions did Ban Gu leave when he went to the Western Regions?

Ban Gu, a historian and author of Hanshu, did not go to the Western Regions, but went on an expedition to Xiongnu with General Dou Xian in the first year of Yongyuan (AD 89). Ban Gu was appointed as the guard of the China Guards and took part in this premeditated discussion. Dou Xian was defeated by Khan, climbed Mount Yanran (now Hangai Mountain in Mongolia), and ordered Ban Gu to write the famous inscription "Yanran" and carve stones to record his merits.

When Ban Chao went to the Western Regions, the allusion was "Nothing ventured, nothing gained".

In the Eastern Han Dynasty, Emperor Hanming summoned Ban Chao and sent him to Xinjiang to make friends with King Shanshan. Ban Chao trudged away with a group of people, not afraid of mountains and roads. They traveled all the way to Xinjiang. King Shanshan heard that Ban Chao was going to the Western Regions and went out to meet him personally. The host regards Ban Chao as a distinguished guest. Ban Chao explained his purpose to his master, and King Shanshan was very happy.

A few days later, the Huns also sent messengers to contact King Shanshan. King Shanshan gave them a warm reception. Huns spoke ill of the Eastern Han Dynasty in front of their masters. Wang Shanshan suddenly felt dejected and uneasy. The next day, he refused to meet Ban Chao, and his attitude was very cold. He even sent troops to spy on Ban Chao. Ban Chao immediately called everyone to discuss countermeasures. Ban Chao said: "Only by getting rid of the Xiongnu emissary can we dispel the master's doubts and reconcile the two countries." But Ban Chao and his men were few, and the Xiongnu soldiers were more closely guarded than Ma Zhuang.

Ban Chao said, "Nothing ventured, nothing gained!" Late that night, Ban Chao came to Xiongnu camp with his soldiers. They were divided into two groups. One group hid behind the camp with drums, and the other group ambushed on both sides of the camp with bows and arrows and swords. They set fire to tents, beat gongs and drums, and made a hullabaloo about. The Huns were in chaos, all of them were killed by fire and arrows. Shanshan made up with Ban Chao after learning the truth.