I Became a Ten-Year-Old Jiajing Emperor

I've read Chapter 40 so far, which is pretty good. The first thunder appeared. Xu Jie's age didn't match up. I remember Xu Jie was the third flower in the second year of Jiajing. The author here said that his nephew was an official? He is 3 or 4 years older than Jiajing. Jiajing is 10 years old, and Xu is 13 or 13 years old.