Phee Jinq En rewrote her own national record in the women's 50m breaststroke event as she qualified for the final at the 2018 Asian Games.
The 20-year-old, who set the then-national mark of 31.54s en route to winning silver at the 2017 SEA Games, clocked 31.46s in Heat Three for the fifth overall fastest time.
2014 winner Satomi Suzuki of Japan set the fastest time at 31.02s, followed by Chinese swimmer Feng Junyang (31.16s) and Japanese compatriot Miho Teramura (31.26s).
Phee was also Malaysia's only swimmer to qualify for a swimming final on Thursday.
Welson Sim (50.34s) and Keith Lim (50.73s) missed out on the men's 100m freestyle final, with the eight finalists clocking under 50 seconds.
Chan Jie was also out-qualified in the men's 50m butterfly event as he registered a time of 24.96s, finishing 0.75s behind Vietnam's Paul le Nguyen who took the eighth and final spot.
Singapore star Joseph Schooling was the pace-setter with a time of 23.84s.
2018 ASIAN GAMES WOMEN'S 50M BREASTSTROKE FINALISTS
1. Satomi Suzuki (Japan) - 31.02s
2. Feng Junyang (China) - 31.16s
3. Miho Teramura (Japan) - 31.26s
4. Suo Ran (China) - 31.38s
5. Phee Jinq En (Malaysia) - 31.46s
6. Roanne Ho (Singapore) - 31.59s
7. Lin Peiwun (Chinese Taipei) - 31.77s
8. Adelaida Pchelintseva (Kazakhstan) - 31.94s
R. Yvette Kong (Hong Kong) - 31.98s
R. Kim Hyejin (South Korea) - 32.34s