ShenZhen's police's contribution to the world

Recently police of ShenZhen city make a great favour to China.
Their action is to show those prostitutes in the square, what contributions of the show is?
First, it makes people to think, prostitues are here, where are the wenching men then?
Second, people also said on the internet that, since the prostitution is banned, why should the government deliver condom in public places, such as bars and dancing rooms.
And thirdly, people now know who are destroy the positive figure of China, who are the real enemy of the country.
Those people do such things to attract world's attention to focus on china to find the ugly side of the country.
But on the other side, their action may improve the development of China's law, make the government to enhance the diathesis of government officials.