Au Yeung Yiu Chung studied at Yan Chai Hospital Tung Chi Ying Memorial Secondary School in Shatin and played for the school's football team in inter-school tournaments.
Au Yeung Yiu Chung made his debut in the Hong Kong First Division League for Hong Kong 08. After the team was disbanded at the end of the season, he turned down an offer from South China to join Workable for the 2007–08 season.
After one season with Workable, which sees the team relegated for 2008–09 season, Au Yeung Yiu Chung finally joins South China and takes over the vacant no. 10 shirt. He was only 18 when he signed for South China.
At South China his playing opportunities are less regular as he plays in a similar position as team captain Li Haiqiang.
In October 2011, Au Yeung Yiu Chung and teammate Kwok Kin Pong were sent to Tottenham Hotspur for training with Spurs' first team as part of the duo's development.
In the 2011 AFC Cup, Au Yeung Yiu Chung was sent on as a substitute against East Bengal. 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.
On 10 June 2013, Yokohama FC (HKG) announced that they have recruited Au Yeung Yiu Chung and will send him, alongside Wong Wai, Leung Kwun Chung and Lee Kar Yiu to Yokohama FC on 16 June for a month's training. Au Yeung Yiu Chung said he joined Yokohama FC Hong Kong because he wants more playing opportunities. He will wear number 19 for his new club.
He scored his only goal in the season against Sunray Cave JC Sun Hei on 30 March 2014.
On 22 August 2014, Atlético CP announced through their official website that they have completed the transfer of Au Yeung Yiu Chung. He made his debut against S.C. Olhanense on 24 May 2015.
Au Yeung Yiu Chung was unable to establish a place in Atlético CP. He transferred to G.S. Loures on 1 November 2015. Also, he has played 90 minutes for the first match.
On 26 December 2015, Au Yeung Yiu Chung had signed by China League One club Guizhou Zhicheng with a 3 years contract.
He 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.
On 14 January 2009, he scored his second goal for Hong Kong with a freekick against India. On 30 September 2011, Au Yeung Yiu Chung scored the equalising goal in the 3:3 draw with the Philippines in the 2011 Long Teng Cup.
Au Yeung Yiu Chung has been appointed captain by coach Kim Pan Gon for the Hong Kong national under-23 football team at the 2009 East Asian Games and led the side to the final against Japan national under-23 football team. The game ended 1–1 after extra time. Au Yeung missed his penalty in the penalty shoot-out and cried. Fortunately Hong Kong scored all the other penalties while Yapp Hung Fai made saves and won the gold medal, which is the first international football tournament title that Hong Kong have ever obtained.
Au Yeung Yiu Chung was a member of the Hong Kong national under-23 football team again for the 2010 Asian Games. In the final group game, Au Yeung Yiu Chung 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. But Hong Kong was then eliminated by 0:3 by Oman.
Au Yeung Yiu Chung was a member of the Hong Kong national under-23 football team again for the 2012 London Olympics. The team won its first round tie against Maldives by 7:0 aggregate score but lost 0:3 on aggregate to Uzbekistan in the second round.
He has been omitted from the national squad ever since due to his lack of form.
South China:Hong Kong First Division League (2): 2008–09, 2009–10
Hong Kong Senior Challenge Shield: 2009–10
Hong Kong League Cup: 2010–11
Hong Kong FA Cup: 2010–11
January 2013 Hong Kong First Division League MVP of the month.
Hong Kong:2009 East Asian Games Football Event: Gold
As of 7 Oct 2015
As of 29 February 2012
As of 16 October 2012