Born in a Hakka family, Yapp finished his studies at Form 5 level. He was admitted by Queen's College Old Boys Association Secondary School for Form 6 but he gave it up to pursue his football dream. He had already represented Hong Kong at under-17 level.
Workable Yapp Hung Fai started his professional career at
Workable when he was only 17 under coach
Lee Kin Wo and
Chan Hiu Ming in 2007. His salary was only HK$5,000. During his time at Workable FC, he helped the team to an unexpected 1:0 win against
South China AA in the
2007-08 Hong Kong League Cup.
Pegasus Yapp Hung Fai joined
Pegasus in 2009.
South China In 2010, Yapp Hung Fai moved to Hong Kong First Division League champions
South China AA. On 29 September 2010, during
Tottenham Hotspur's chief scout Ian Broomfield's visit to South China, he praised Yapp for his enormous potential. "He [Yapp] is not tall, but his reactions are sharp and he is quick to come out of the box to block strikers. He is also very committed and very well disciplined." After defeating
East Bengal in the
2011 AFC Cup game at home on 14 April 2011, South China striker
Mateja Kezman suggested that Yapp Hung Fai has what it takes to play in European football leagues. During the summer of 2013, Yapp had agreed to a 4.5-year contract with
Guizhou Renhe. However, his registration was denied by the
Chinese Football Association on the grounds that Yapp did not qualify as a domestic player and as such, would violate the
Chinese Super League stipulations which require all keepers to be domestic players.
Eastern In June 2014, Yapp returned to
Eastern after his contract with
South China expired. In 2016, Yapp helped Eastern win the first
Hong Kong Premier League Trophy. On 28 September 2020, Yapp also helped Eastern win the
2019–20 Hong Kong FA Cup. It is the fifth FA cup trophy for Eastern. On 20 November 2024, Yapp played his 200th match for Eastern. In the 2024–25 season, Yapp helped Eastern win the FA Cup and Senior Shield Trophy. ==International career==