From school website, there are 7 classes for graduates of 2013, that means 21 ...
the principal said the same thing every year, however, there was a great deal of GHK students couldn't get a seat in their primary section last year, you can check on the primary's chat page, many parents from GHK complained there
From school website, there are 7 classes for graduates of 2013, that means 210 students, not as mentioned as 180 graduates, 170 which can be promoted to primary school, the ratio is 80% instead of 90%.