I like Susan612's first sentence. Maybe you want the second sentence to say, "It has been said that the treatment of Asian women is the clearest evidence of this problem."

Maybe something like: Sexual discrimination has long been a problem which has attracted a lot of attention throughout the world. I still don't understand what you want to say in the second sentence.

first, thank your comment. i mean sexual discrimination is the problem which are cared by people (i think interest=care in this case), not enjoyable :D and the second sentence i want to lead to the content which i want to analyse ( about chinese women)

No, they're not correct, but I'm not sure exactly what you want to say. I wouldn't describe sexual discrimination as an interesting(not interested) problem, and I don't understand your second sentence at all.