Meet Hong Kong's 'tutor kings and queens'

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They strike glamorous poses in posters in shopping malls and on the sides of buses.

But they are not movie stars or supermodels - they are Hong Kong's A-list "tutor kings" and "tutor queens".

The pressure on pupils to perform well in exams has turned top tutors into high-earning celebrities, as they benefit from the huge demand for lessons outside school.

Is this private tuition an extra help that raises education standards? Or does it add excessive stress on young people?

Andrew Wood reports.

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