I’ve been to China about 15 times in the last 7 years.The plug is different, the two parallel prongs are at angles.
Most decent hotels will let you borrow the adapter plugs or buy from them.
Most hotel rooms in China are NOT wireless you must have an Ethernet cord.
Usually in lobby the have secured wireless access but you will need a password to get in. Almost all laptops sold in the USA can take 110 or 220 volts, the plug is what you need to worry about