"emperor" . "Emperor Soongjung" . . . "last emperor" . . "Chongzhen Emperor" . . . . "Chongzhen Emperor" . . . "Chongzhen" . . . "Emperor Chongzhen" . . . . . . . . . . . . . "the last Ming emperor" . . . "1627" . . . "Chongzhen reign" . "Zhu Youjian" . . . . . "Chongzhen Emperor of China" . . "the next ruler" . "1644" . . . . "Prince Xin" . "Sung-ching Emperor" . . "Chongzhen era" . . . . . . "Chongzhen emperor" . . . . . . . "emperor Chongzhen" . . "Sung-tsing Emperor" . "Chongzhen period" . . "the last emperor" . . "Chongzhen Emperor" .