汉景帝
The area was named "Kaifeng" after the Qin's conquest of China in the second century BC. The name literally means "opening the border" and figuratively "hidden" and "vengeance". Its name was originally Qifeng (), but the syllable "qi" (Baxter-Sagart: /*kʰˤijʔ/) was changed to the essentially synonymous "kai" （/*Nə-[k]ʰˤəj/, /*[k]ʰˤəj/） to avoid the naming taboo of Liu Qi (Emperor Jing of Han).