For foreign teachers, business people, cionstructiion workers - simply everyone. For example, sex tourists abusing children come from all sexes and all walks of life. [edited]

You're likely to get struck by lightning as you copy&paste in your living rooms in three different locations as being sexually molested by a woman. Be far more effective if the Chinese concentrated their budgets on winkling out the risky from among the men. You are preaching political correctness gone mad. It's a bit like the London police doing stop and search looking for explosives on the tube and stopping the same number of 70 year old white grannies as often as they do to people who might look the part. Extra special attention must be paid to men. And men of a certain age maybe. Getting done for smashing up a phone box when you're young should not be taken into account. They should get thrashed within an inch of their lives when it happens but they are not likely to be a sexual threat ever.