Malaysia, China, Indonesia and Thailand all advanced to the quarter-finals on the second day of the Badminton Asia Mixed Team Championships.
The four countries can no longer finish outside of the top two of their group so are assured of a place in the last eight at Hong Kong's Queen Elizabeth Stadium.
Thailand thrashed Sri Lanka 5-0 in the format which sees men's and women's singles, men's and women's doubles and mixed doubles all played.
Indonesia had beaten the same opponents by the same scoreline in Group C yesterday and with only three teams in the group, it means both victors have advanced.
In Group D, Malaysia beat Macau 5-0 to send themselves and China through.
China also beat Macau 5-0.
Group B remains open as Singapore defeated India 3-2 after losing by the same scoreline to Chinese Taipei yesterday.
It means all three teams could still progress with India playing Chinese Taipei in the last match.
Defending champions Japan and hosts Hong Kong are the only teams in Group A so will both go through, regardless of who wins their match tomorrow.
Elsewhere the Badminton World Federation Orléans Masters, a World Tour Super 100 tournament, continued in France.
Women's top seed Kirsty Gilmour of Scotland won her first round clash against Canada's Brittney Tam, 21-12, 21-10 at the Palais des Sports.
Dutch player Mark Caljouw, the second seed and highest ranked men's player left, came from behind to knock out Giap Chin Goh of Malaysia.
He won 21-23, 21-11, 21-12.
Both events continue tomorrow.