Hulao Pass, Mountain pass in China
Hulao Pass is a strategically important pass located near Luoyang, Henan.
Known as the site of the famous Battle of Hulao in 621, where Li Shimin defeated Dou Jiande.
The pass is often referenced in Chinese historical texts and classical literature.
It is now a historic site accessible to tourists interested in ancient military history.
The name 'Hulao' means 'Tiger Cage', symbolizing its impregnable nature.
Source: Wikimedia