Since 2010, Ng has been supported by the
Hong Kong Sports Institute (HKSI), where she is an elite sports scholarship athlete. In 2015, she was receiving
HKD25,000 a month from the HKSI.
2007–2009: IBSF tournament success Ng's first experience of an international snooker competition was at the 2006
IBSF Women's Championship in
Amman, Jordan, In the group stage of the 2007
IBSF World Under-21 Snooker Championship, she recorded a 3–0 win over Hasani Armaghan of Iran and a 3–1 win over
Arantxa Sanchis but lost 0–3 to
Bi Zhu Qing. She also achieved 3–0 wins over Ramona Belmont of New Zealand, and Aakanksha Singh and Keerath Bhandaal from India, the latter of whom was aged 11. In the semi-final, Ng won the first frame against her opponent Belmont, who took the next one. Ng won the following two frames to face
Bi Zhu Qing in the final, in which Ng lost the first two frames then equalised the score to 2–2 before losing the last two frames. Bi won the match 4–2. Ng lost her quarter-final match 2–3 to
Bi Zhu Qing at the
2007 Asian Indoor Games in
Macau in November 2008. In the qualifying group for the
2009 IBSF World Snooker Championship, Ng lost 2–3 to Ramona Belmont, whom she had defeated twice in the 2007 under-21 championship, and then bested
Anuja Chandra 3–1 and Yu Ching Ching 4–2. In the last-16 round, Ng was trailing 0–2 to Yu Ching Ching but won four frames in a row to win the match 4–2. In the semi-finals, Ng faced Belmont and prevailed 4–3, having led 2–0 before falling behind 2–3. In the final, Ng produced some impressive and defeated
Kathy Parashis, a 10-time winner of the Australian Open, 5–1. When Ng was leading 3–1, the players were summoned to
drug tests and returned to take the remaining frame she required to win the match, becoming the youngest-ever
IBSF women's champion at the age of 19. Ng was omitted from the Hong Kong squad for the 2009
East Asian Games, which were held in Hong Kong soon after her victory in the IBSF World Championship, because she was unable to attend the team training camp.
2010–2011: Second IBSF world title At the
2010 Asian Games, Ng won the gold medal as a member of the women's
six-red snooker team, along with So Man Yan and
Jaique Ip. She also won a bronze medal for reaching the semi-finals in the six-red singles competition. She lost 3–4 to
Chen Siming in the semi-finals of the individual competition. On 15 December 2010, Ng successfully defended her
IBSF World Snooker Championship title in Syria, defeating compatriot Jaique Ip 5–0 in the final. Having won the first three frames comfortably, Ng won the last two frames on the . On her way to the final, Ng won all six of her matches in the qualifying group without losing a frame.
2012: First ranking event win Ng won her first women's ranking event, the 2012
Northern Championship, without losing a frame during the tournament. She bested
Maria Catalano 3–0 in the final. Having won the previous two IBSF world championships, in 2009 and 2010, Ng topped her qualifying group in 2012 by winning all four matches. She then progressed by defeating Arantxa Sanchis 4–1 in the last 16, Nicha Pathomekmongkhon 4–2 in the quarter-finals, and Siraphat Chitchomnart 4–2 in the semi-finals. In the final, Ng won only the third frame, losing 1–5 to
Wendy Jans.
2013: Six-reds success Ng won a silver medal at the
2013 Asian Indoor and Martial Arts Games in
Six-red snooker in July, losing 3–4 to Amornrat Uamduang in the final. At the WLBSA World Championship, she lost 0–4 to
Maria Catalano in the semi-finals. In October 2013, Ng won the inaugural IBSF World Six-red snooker Championship in
Carlow, Ireland. In the final, her opponent
Daria Sirotina failed to score in three of the four frames Ng won to take the title 4–0, the frame scores being 34–0, 43–0, 45–37 and 42–0.
2014: World Championship runner-up Ng won the WLBSA Southern Classic in February with a victory over Maria Catalano in the final. Ng also reached the semi-finals of the IBSF World Championship, losing 1–4 to
Wendy Jans.
2015: Ladies' World Champion In February 2015, Ng lost 1–5 to Reanne Evans in the final of the Eden Resources Masters tournament. Emma Bonney won the first two frames of the final, winning them 59–22 and 68–38. Ng won the scrappy, 47-minute third frame 45–11. The highest break in the fifth frame, which took 46 minutes and 58 seconds, was eight (red, pink, red from Bonney), with Ng taking it 72–20. Ng then made five breaks in the twenties and won the next three frames to become the first new world ladies' champion since Reanne Evans won the first of her ten consecutive titles. and defeated
Arantxa Sanchis 4–0 and
Amee Kamani 4–1 to reach the final. Ng and her playing partner Katrina Wan Ka Kai won the 2016 World Women's Snooker pairs title by defeating
Maria Catalano and Tatjana Vasiljeva 4–1 in the final. At the 2016
World Ladies Snooker Championship, the top-eight
seeds, including defending champion Ng, were placed in the knockout and each faced a qualifier. Ng progressed to the final without losing a frame, besting Laura Evans 3–0, Katrina Wan 4–0, and
Rebecca Kenna 4–0. In the final, Reanne Evans took the first frame but Ng won three in a row to go two frames ahead. Evans won the next two frames to equalize at 3–3. Ng then took the seventh frame to lead 4–3. Evans then won three consecutive frames to take the match 6–4 and win the title. Ng was granted a
wild card for the
2016 World Snooker Championship as the
Women's World Champion, and became the first Asian woman to play in the
World Snooker Championship, losing 1–10 to
Peter Lines in her first match. With Katrina Wan, Ng won the IBSF World Six-reds snooker team tournament in
Sharm-El-Sheikh, Egypt, with a 4–3 victory over
Vidya Pillai and
Amee Kamani of India in the final. Fifteen minutes after the conclusion of the team final, Ng played Pillai in a quarter-final match of the singles and lost 2–4. Ng won the inaugural
Paul Hunter Classic, which was held in
Fürth, Germany. After winning all three matches in her qualifying group 3–0, Ng won the deciding frame 4–3 against Irina Gorbataya in the last 16, having trailed 1–3. She progressed through the quarter-finals and semi-finals without losing a frame in either round. Ng won 4–0 over Wendy Jans, during the third frame of which she made the tournament's highest break, a 104. She then defeated Maria Catalano, also 4–0. In the final, Ng took a 2–0 lead against Reanne Evans, who won the third frame. Ng won the next two frames, both of which were closely contested, to win the final 4–1. At the first Asian Billiard Sports Championships, which was held in 2016 in the United Arab Emirates, Ng defeated Arantxa Sanchis 5–1 in the semi-finals and Vidya Pillai 5–1 in the final to gain the title. and 1–4 to Wendy Jans in the quarter-final of the IBSF World Snooker Championship later the same month.
2017: Regains World Championship In 2017, Ng supported the Hong Kong Women's Foundation campaign
#MyRealCareerLine, which was set up to tackle sexism and gender inequality at work. She appeared in a YouTube video for the campaign in March 2017. The
2017 World Women's Snooker Championship was held in
Singapore, marking the first time in over 20 years the tournament had taken place outside the United Kingdom. The group stage matches were contested as best-of five , with all dead frames being played. Ng topped her qualifying group by winning all three of her matches: 4–1 against both Charlene Chai and Chitra Magimairaj, and a 5–0 win against Ronda Sheldreck. In the knockout stage, Ng defeated Pui Ying Mini Chu 4–0 in the last 16 and
Waratthanun Sukritthanes 4–3 in the quarter-finals. She then faced defending champion Reanne Evans in the semi-finals, where she won 5–4 after recovering from a 60-points deficit in the deciding frame. Ng's opponent in the final was
Vidya Pillai, the first Indian player to reach the final of the Women's World Championship, With a playing time of eight hours and four minutes, the final was the longest 11-frame competitive match in snooker history, significantly exceeding the previous record of 7 hours and 14 minutes that was set at the
1992 UK Snooker Championship. Finishing at 1:30 am local time, Ng was one of only two women competitors in the
mixed singles snooker at the 2017 World Games, held in
Wrocław, Poland. Ng lost in the deciding frame of her first match 2–3 against
Michael Judge. Ng was seeded into the last 16 at the 2017 Paul Hunter Women's Classic in
Fürth, Germany; she reached the semi-finals without losing a frame, defeating both Inese Lukashevska and Diana Stateczny 4–0. She then narrowly defeated So Man Yan 4–3 to reach the final, where she lost 1–4 to Reanne Evans, having won only the third frame.
2018: Earns top ranking and retains World Championship On reaching the quarter-finals of the WLBSA British Open in
Stourbridge, England, in February 2018, Ng became the first Asian player to top the women's rankings. She progressed to the semi-finals, where she lost 2–4 to
Nutcharut Wongharuthai. Ng successfully defended her world championship title, without conceding a frame, at the
2018 tournament held at
St. Paul's Bay, Malta. She had started with low expectations for her performance at the event because she felt unwell and under pressure, and was suffering from loss of form. Ng emerged from the qualifying stage with 3–0 wins over Judy Dangerfield, Katarzyna Bialik, and Ronda Sheldreck, and was seeded into the quarter-finals, where she defeated Wendy Jans 4–0. She then defeated Rebecca Kenna 4–0 in her semi-final, winning a place in the final with Maria Catalano, who had defeated Reanne Evans 4–3 in the other semi-final. Ng won 5–0 to gain her third world title. Ng was runner-up in the World Women's 10-Red Championship and the World Women's Six-red Championship, which were both held in Leeds, England, in April 2018. Ng lost in the final of both tournaments to Reanne Evans. She then entered
2018 Q School in an attempt to win a place on the professional snooker tour. Ng took the 2018 LITEtask UK Women's Championship title in September, defeating
Suzie Opacic 3–2, Ploychompoo Laokiatphong 3–0, and Jaique Ip 4–0. In the final, she defeated Rebecca Kenna 4–1 after losing the first frame. At the Australian Open, Ng scored a 139 break in the third frame of her semi-final against Nutcharut Wongharuthai; her then-highest break in competition. Having won all of her five qualifying matches 4–0 against Australian opponents, Ng defeated another Australian, Judy Dangerfield, 3–0 in the last 16, Pui Ying Mini Chu 4–0 in the quarter-finals, and Wongharuthai 4–2 in the semi-finals. Ng won the final, defeating Katrina Wan 4–2. At the IBSF Six-red Women's Snooker Championship in
Marsa Alam, Ng was the only player in the women's qualifying groups who did not lose a frame. In the knockout phase, she defeated Thai players
Siripaporn Nuanthakhamjan 4–2 and Nutcharat Wongharuthai 4–1, before losing the final to another Thai player, Waratthanun Sukritthanes, 2–4.
2019: Third IBSF world title Ng reached the final of the 2019 Belgian Women's Open with wins of 3–0 over Jane O'Neill and
Emma Parker, and of 4–3 over
Nutcharut Wongharuthai in the semi-finals. She won the first frame of the final against
Reanne Evans, but lost the next four to finish as runner-up. She was also defeated by Wongharuthai 4–1 at the quarter-finals stage of the
2019 World Women's Snooker Championship, making 2019 the first year since 2012 that Ng had not reached at least the semi-finals of the tournament. Consequently, she lost the number one position that she had held for 14 months, as Reanne Evans regained the top ranking. In April 2019, Ng played
Alan McManus in the first round of qualifying at the
World Snooker Championship – after winning the first two frames, she eventually lost the match 6–10. She was runner-up in the 2019 Women's Tour Championship, held at the
Crucible Theatre, defeating
Rebecca Kenna 2–0 in the semi-finals before losing the one-frame final to Reanne Evans. Ng then registered wins over Tani Mina 3–0, Jessica Woods 3–1, and So Man Yan 4–1, to reach the final against Wongharuthai, who won the match 4–2 to gain her first ranking tournament win. Ng won her third
IBSF world snooker title in
Antalya in November 2019. She dedicated her victory to Poon Ching-chiu, a fellow snooker player who had died at the age of 18 during the fortnight before the final. before defeating Joy Lyn Willenberg 3–0 in the last 16, and
Amee Kamani 4–1 in the quarter-finals. Her semi-final against Waratthanun Sukritthanes was taken to a deciding frame, but with breaks of 34 and 40, Ng won the last frame 85–0 and the match 4–3. She then played Wongharuthai in the final where, after trailing 0–2, she took five consecutive frames to win the match 5–2.
2020: Belgian Open Champion Ng won the 2020 Belgian Women's Open, which was her first ranking tournament victory since the 2018 Australian Open. She was seeded directly into the last-16 round, where she defeated both Albina Liashcuk and Steph Daughtery 3–0. She then bested Wongharuthai 4–2 in the semi-finals. In the final she was 2–1 ahead of Reanne Evans after losing the first frame. From 2–2, Ng won the next two frames to take the title with a 4–2 win. Ng was given a
wildcard place for the qualifying rounds of the
2020 World Snooker Championship. The final stages of the tournament were due to take place in April and May 2020 but were postponed due to the
coronavirus pandemic. She declined to participate in the tournament due to COVID-19 safety concerns. With World Women's Snooker events cancelled or postponed during the coronavirus pandemic, Ng's next competitive appearance was at the 2020 Hong Kong Women's Snooker Open Championship, nine months after the Belgian Open. She won the title with a 4–0 defeat of Cheung Yee Ting in the final.
2021 onwards On the World Women's Snooker circuit for 2021–2022, there were five ranking events. Ng won the Eden Women's Masters, winning the deciding frame of her semi-final against Kenna after needing three snookers, and recovering from 1–3 against Evans in the final to win 4–3. She took the season's last ranking title, the Winchester Open, by defeating Wongharuthai 4–0 in the final. Ng achieved her first win on the World Snooker tour by eliminating
Wu Yize 4–2 at the
2022 Welsh Open. She lost 1–4 to
Ali Carter in the next round. She fluked the final pink in the deciding frame to defeat 1997 world champion
Ken Doherty 4–3 in the
2022 British Open qualifying, a victory she described as "one of the best of my career". In the 2023–2024 season, Ng won three women's ranking events: the Australian Open, Albanian Open and British Open. She was also runner-up at the US Open and the Belgian Open, and finished the season at the top of the one-year ranking list. In the following season, she won the US Open and retained the British Open title, and finished the season ranked second. She qualified again for the World Snooker Tour for two seasons starting in the
2025–26. At the
2025 Championship League (ranking), she became the first woman to reach the last 32 of a professional ranking event At the
2025 English Open, she made a 137 , breaking the record for the highest break made by a woman in professional competition. On the WWS circuit, she won the UK Women's Championship, the Belgian Women's Open and, for the third consecutive year, the British Women's Open. She was runner-up at the Women's Snooker Open in Bangkok and the WSF Women's Championship. == Honours and awards ==