Before revision: Therefore, the education sector has become a profitable industry which businesses have created different kinds of products and advertisement such as "the king/queen of tutorial", a usual advertisement tactic of Hong Kong tutorial centers that has spread to South Korea, Thailand, Sri Lanka and India where tutors achieve "celebrity-like status".
After revision: ,Therefore, the education sector has become a profitable industry which businesses have created different kinds of products and advertisement such as "the king/queen of tutorial", a usual advertisement tactic of Hong Kong tutorial centers that has spread to South Korea, Thailand, Sri Lanka and India where tutors achieve "celebrity-like status".