Taizong felt that he could not surpass his brother (Emperor Taizu) in terms of military conquests and achievements and decided to focus more on developing his dynasty internally and establish his legacy. He implemented a series of economic and literary reforms which were better than his brother's. He also initiated many construction projects and inducted new systems absent in Emperor Taizu's reign. Emperor Taizong died in 997 after reigning for 21 years at the age of 57. He was succeeded by his third son, who became Emperor Zhenzong. Family Consorts and Issue: Empress Shude, of the Yin clan () unnamed daughter Empress Yide, of the Fu clan (; 941–975) Empress Mingde, of the Li clan (; 960–1004) Unnamed son Empress Yuande, of the Li clan (; 943–977) Zhao Yuanzuo, Prince Hangongxian (; 965–1027), first son Zhao Heng, Zhenzong (; 968–1022), third son Unnamed daughter Unnamed daughter Noble Consort Sun, of the Sun clan (貴妃孫氏) Worthy Consort, of the Gao clan (贤妃 高氏) Virtuous Consort, of the Zhu clan (德妃 朱氏, d. 1035), personal name Chonghui (冲惠) Able Consort, of the Shao clan (賢妃 邵氏, d. 1016), personal name Zhaoming (昭明) Noble Consort, of the Zang clan () Zhao Yuancheng, Prince Chugonghui (; 981–1014), seventh son Princess Hejing (; d. 1033), fourth daughter Married Chai Zongqing (; 982–1044) in 1002 Princess Ciming (; d. 1024), personal name Qingyu (), sixth daughter Noble Consort, of the Fang clan (; d. 1022) Princess Xianmu (; 988–1051), ninth daughter Married Li Zunxu (; 988–1038) in 1008 Virtuous Consort, of the Wang clan () Zhao Yuanyan, Prince Zhougongsu (; 986–1044), eighth son Shuyi, of the Li clan (淑儀 李氏) Shuyi, of the Wu clan (淑儀吳氏) Unknown Zhao Yuanxi, Crown Prince Zhaocheng (; 966–992), second son Zhao Yuanfen, Prince Shanggongjing (; 969–1005), fourth son Zhao Yuanjie, Prince Yuewenhui (; 972–1003), fifth son Zhao Yuanwo, Prince Zhengongyi (; 977–1018), sixth son Zhao Yuanyi, Prince Chong (), ninth son Princess Heqing () Princess Yinghui (; d. 990), second daughter Married Wu Yuanyi (; 962–1011) in 984 Princess Chunmei (; d. 983), third daughter Princess Yishun (; d. 1004), fifth daughter Married Wang Yiyong (; 986–1056) in 1003 Ancestry See also Chinese emperors family tree (middle) List of emperors of the Song dynasty Architecture of the Song dynasty Culture of the Song dynasty Economy of the Song dynasty History of the Song dynasty Society of the Song dynasty Technology