1, Nanjing No.9 Middle School was founded earlier than No.13 Middle School. Nanjing No.9 Middle School, founded in 1902, is one of the earliest public middle schools in Jiangsu Province with a history of one hundred years. Nanjing No.13 Middle School Suojin Branch, formerly known as Nanjing Suojincun Middle School, was founded in 1985. In the first half of 2003, it became a junior high school branch of Nanjing No.13 Middle School in the adjustment of educational layout.

2. The teaching quality of Nanjing No.9 Middle School is higher than that of No.13 Middle School. Nanjing No.9 Middle School is a key middle school in Jiangsu Province, and its teaching quality has always been in the leading position in the province. The school has a group of high-quality teachers and perfect teaching facilities, which can provide students with a good learning environment and high-quality educational resources; Nanjing No.13 Middle School pays attention to the all-round development of students, not only their academic achievements, but also the cultivation of their thinking ability, innovation ability and practical ability.