 He scored two points with a chest-high roll-through with 42 seconds left in regulation time and then added two more points with another roll in overtime to score a 4-0 victory.In November 1996 Sim became the last world light flyweight (48 kg) champion at the 1996 World Cup where the FILA's final international 48 kg class competitions were held, dominating all the opponents by technical fall including two-time World Champion Wilber Sánchez of Cuba.Sim moved up in weight from 48 kg to 54 kg in 1997 when the new weight classes were established by FILA.