similar your case, my child was only played two songs buy only half then stopped by him. my child told me that he shake hands with my child after playing, so my child said he is really nice.
did not ask any about the aural and sight reading.
Which course did you apply? Violin 301/201 or 101? For 301, the first audition was taken by Mr. Wong, therefore, I guess everyone should have the 2nd audition to be interviewed by Prof. Ma. Correct me if I am wrong.