Linyi lanshan district No.15 Middle School is not a branch of Linyi lanshan district No.6 Middle School. In terms of teaching quality, Linyi No.6 Middle School is superior to Linyi No.15 Middle School. Linyi No.6 Middle School is Linyi Shengli Middle School, formerly known as Linyi Shengli Middle School, with strong teachers, high students' quality, positive study style, high teaching quality and high social recognition. Linyi No.15 Middle School is a school jointly established by lanshan district Education and Sports Bureau and Yinxingshan Sub-district Office. Formerly known as Yinheshan Middle School in Linyi, it has strong teachers, poor students' quality and strict teaching management. A few years ago, it was named Linyi Liuzhongxi Campus. Thanks to the support and help of Linyi No.6 Middle School, the teaching quality has been steadily improved and widely praised by the society, but there is still a big gap compared with Linyi No.6 Middle School.