It’s safer to enter China with proof of a return ticket, especially if you are entering on a return ticket. There have been cases of people being turned away at the border without proof of intent to return (in the form of such a ticket).
In most major Chinese cities, you won’t be in want of any amenities you may be used to. Women should bring the toiletries they are most comfortable with (tampons are less commonly used in China than the West).
If you’re coming from Europe, electrical outlets are two-pronged, as they are in North America.
Much of the internet the rest of the world is accustomed to is blocked in China. This includes Google search, Facebook, Gmail, WhatsApp, Instagram, Wikipedia, many news websites, the list goes on.
If you wish to have use of such services from within the country, it’s a wise idea to invest in a VPN (Virtual Private Network). A VPN will allow you to access the internet through a server in another part of the world that is not privy to such restrictions.
It’s much easier to download a VPN beforehand, rather than after arrival in the Mainland. Do your research and make sure the VPN of your choice is capable of working from within the Mainland.
An open mind
China is an ancient culture, that has it’s own way of doing things. Accept it for what it is, rather than wish for it to be what it is not, and you’ll bound to enjoy yourself more.