Complex sentence: It is one of the top schools in Hunan and is considered as a second choice for students who prefer Yali.It's junior department is one of the major student sources of Yali: one-third of new students of Yali in 2013 are from Nanya.
Split into simpler sentences: It is one of the top schools in Hunan and is considered as a second choice for students who prefer Yali. Its junior department is one of the major student sources of Yali: one-third of new students of Yali in 2013 are from Nanya.