Can I go to China with new and old passports?

I have just had to renew my UK passport, however I am travelling to China shortly I have a valid entry permit in my old UK Passport (still valid for 1.5 years). Will I have to apply for a new entry permit in my new passport, or can I present the new passport and old one with the Visa to enter the country (I am only there for 4 days before flying out again)?