Enter china with a passport that expires 3 months after intended stay

I am a dutch citizen holding a dutch passport, which will expire on 6th. May of 2015. I intend to travel to Hong Kong on the 26th. of January and will leave Hong Kong on the 6th. February 2015 to return to Europe. I have a return ticket.

May i enter Hongkong with still a 3 month validity on my Passport beyond my intended stay in Hongkong? How about mainland China, will i get a visum to enter Shenzhen, just for shopping and short stay in Shenzhen.