According to Edu Bureau, 5yrs8mths is ok for P1. My son is a 'small boy' born at the end of the year. That's why he's going to be in P4 this Sep. He went for PET when he was in P2. He was just lucky.
On the other hand, his Chinese is weak. So I am wondering if there's any repeating class policy in TSL. Will Chinese be very difficult? What if the student fails the Chi exam? Repeating the grade?