Let me start by stating that I am not trying to make fun of China.  It is a well known fact that sometimes, many countries do carry on their books Laws that are totally amazing, stupid and ridiculous, including good old USA. 
While reading some old existing Chinese Laws, I ran into one the other day that I though it served no good purpose, yet it is still an existing law and a valid one that could be enforced.  In a few words, and sharing it wi\th you all, this Law says that no women can be without clothes walking around inside a hotel room.    That's it !.  Three facts, one is a woman (thus men can do), second she can not be naked inside the privacy of her hotel room, and third walking inside her room without clothes on.

Now, who can see her and call the Police?.  Husband ?  Lover?  What would be the purpose of having this law on the books, to prevent what ?.  Why is still in the books and has not been eliminated ?. 

Have you run into, or heard from someone else, about a similar ridiculous Law?.  A local Chinese lawyer friend told me that there is an old law that says only intelligent people can go to college here, have you heard that one.

And again, this is not happening only in China, but also in many countries abroad.  as an example, below are a few in existance now in USA :
In Los Angeles, It is not legal to bathe two babies at the same time in the same tub.

• In Riverside, Kissing on the lips, unless both parties wipe their lips with carbonized rose water, is against the local health ordinance.
• In Walnut, No person shall wear a mask or disguise on a public street without a permit from the sheriff. Source: 17-32 Mask or disguise--Wearing.
• In Walnut, It shall be unlawful for any person to fly, above an altitude of ten feet above the ground, or near any electrical conductive public utility wires or facilities, any kite or balloon which has a body or any parts, tail, string or ribbon Source: 17-1 Kite flying restricted