If i'm not mistaken, the last National Closed won by a "not so young" player is 11 years ago ( 1993) . The tourney is won by Yeoh Chin Seng . Since then, the annual tourney was all won by a player below 20 years old.
Looking at the results after round 8, it seems that 6 players is the contender for this year title. The players is Lim Zhou Ren, NM Edward Lee, Evan Timothy Capel, Abel Yap, Abdullah Che Hassan and Mohd Saprin Sabri .