Tianqi Emperor sibling Chongzhen Emperor
The Tianqi Emperor (Chinese: 天啓帝; pinyin: Tiānqǐ Dì;  23 December 1605 – 30 September 1627), personal name Zhu Youjiao (Chinese: 朱由校; pinyin: Zhū Yóujiào), was the 16th Emperor of the Ming dynasty, reigning from 1620 to 1627. He was the eldest son of the Taichang Emperor and a elder brother of the Chongzhen Emperor, who succeeded him. "Tianqi", the era name of his reign, means "heavenly opening".The Tianqi Emperor died heirless on 30 September 1627 due to his only son having died in the Wanggongchang Explosion and was succeeded by his fifth and sole surviving brother, Zhu Youjian, because he had no sons to succeed him. Zhu Youjian was enthroned as the Chongzhen Emperor. As both the Tianqi Emperor's daughters died early too, it seems that there were no natural heirs from the emperor left alive.
brother or sister kin