Is there a relationship between Emperor Taizong and Emperor Xuanzong of Tang Dynasty?

1. Emperor Taizong (/view/254 1.html? Wtp=tt) is the Tang Xuanzong (/view/5 176.html? Wtp=tt)' s great-grandfather, after Taizong, his son was Tang Gaozong, after Tang Gaozong, his son was Tang Ruizong, and after Tang Ruizong, his son was Tang Xuanzong.

Actually, Emperor Taizong and Xuanzang were not sworn brothers, but Ju and Xuanzang became sworn brothers. Is the king of another country.

3. Emperor Xuanzong of Tang Dynasty was the same emperor as Yang Guifei, also called Tang Huang Ming.

4. The reign of Emperor Taizong (65438+1October 23rd, 599-1July, 649) was from 627 to 649, and that of Xuanzong (685-762) was from 7 13 to 756.