in 1977, the precious blood golden jubilee secondary school was exposed with a corruption scandal. the teachers and students launched a strike for two days. in response to it, the director of education issued warning letters to the teachers. the ptu received complaints from the teachers and demanded the withdrawal of the warning letters. afterwards, the school changed its leadership and issued new restrictions into teachers' contracts and issued warning letters to teachers regardless szeto wah's advice. in may 1977, the education department closed down the school with the approval of the executive council. the ptu organised assemblies and petitions to demand the reopening of the school and investigation of the event. as a result, governor murray maclehose appointed a three-member committee into the event consisting of rayson huang, lo king-man and maisie wong. the committee suggested the founding of the ng yuk secondary school to receive the teachers and students, withdraw the warning letters and negate the actions of the school.