Zhu Qizhen (Cheng-t'ung) (November 29, 1427 - February 23, 1464) was an emperor of the Ming Dynasty. He ruled as the Zhengtong Emperor from 1435 to 1449, and as the Tianshun Emperor from 1457 to 1464. Wikipedia
The definitive Wikipedia entry for Zhengtong Emperor. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Zhengtong_Emperor
