In October 2011, Au Yeung and teammate Kwok Kin Pong were sent to Tottenham Hotspur for training with Spurs' first team as part of the duo's development.

He played on the right wing and delivered a perfect cross for Mateja Kežman to head home and scored the winning goal for South China.

[3] Au Yeung scored his only goal in the season against Sunray Cave JC Sun Hei on 30 March 2014.

On 26 December 2015, Au Yeung had signed by China League One club Guizhou Zhicheng with a 3 years contract.

[6][7] On 2 March 2018, Hong Kong Premier League club Dreams announced that they had signed Au Yeung.

He signed a one-year contract with Tai Po on 31 July 2018 in order to work with head coach Lee Chi Kin.

On 19 June 2019, Au Yeung announced that his contract with Tai Po had ended and would search for a new club abroad.

[12] And he went on playing for the club in the first half of the 2019–20 season while a regular starting XI place was not guaranteed due to the arrival of several attacking players.

On 21 January 2023, J3 League club Iwate Grulla Morioka announced that they had signed a contract with Au Yeung.

[15] Au Yeung was selected for the Hong Kong team in 2008 and made his international debut in the 9–1 thrashing of Macau in November of the same year, scoring one goal.

In the final group game, Au Yeung scored two goals against Bangladesh and helped Hong Kong win 4:1 and advance to the knock-out stage for the first time in 52 years.