The Olyroos dominated every minute of their contest against the Taiwanese, barely allowing the ball to travel out of their opposition's half. 

Abraham Majok opened proceedings with a brace, before centrebacks Thomas Deng and Tass Mourdoukoutas each notched a goal. 

Pierce Waring finished the game off with a classy double, saving one of the finest goals of the night for the last, shimmying past a defender before blasting into the top corner from range.

J-League based Waring was the only Olyroo scorer across both opening qualifiers, as Graham Arnold looked to rotate his squad heavily over five games (including friendlies) in just over a week.

Despite the fixture congestion, it's been a quick settling period for Arnold's side after a stuttering 2-0 loss to Malaysian club side Petaling FC and 1-1 draw with Malaysia's U/23 national team in pre-qualification friendlies.

This result comes after the Olyroos, who are aiming to qualify for their first Olympic games since 2008, beat Cambodia 6-0 on Friday night. The goal difference will prove key if the Olyroos draw against their next opponents, South Korea, who put eight past Chinese Taipei in their first qualifier.

The Olyroos face the Koreans on Tuesday afternoon (AEST) in their final group stage match, with the Koreans also set to play tonight against Cambodia. 

Australia will qualify for the 2020 AFC U/23 Championship if they beat South Korea, finishing first in their group. The four best second-placed teams also qualify, while there is further wiggle room should hosts and automatic qualifiers Thailand finish in a qualifying place.