"婦女在公眾場合上空是違法": not in New York.

Topless Women in Public Not Breaking the Law, Says NYPD

Ladies of New York, you are free to walk bare-breasted through the city! New York City's 34,000 police officers have been instructedthat, should they encounter a woman in public who is shirtless but obeying the law, they should not arrest her. This is a good step towards gender parity in public spaces.

http://www.policymic.com/articles/42359/topless-women-in-public-not-breaking-the-law-says-nypd