Direct Subsidy Scheme
Ching was a Chinese Language and Chinese History teacher at Diocesan Boys' School. In 2002, he opposed the school's move from a free-of-charge Grant School to a fee-paying Direct Subsidy Scheme school. He criticized the move as a unilateral decision which sidelined teachers from the decision-making process, citing an internal secret ballot which showed that 70% of the school's teachers opposed the move. He argued that the Direct Subsidy Scheme excluded poor families from high-quality education and reduced social mobility. Ching commented in 2013 that, since the school became fee-paying, there had been a substantial decrease in the number of lower-class students, and the school's management had become less transparent.