Visa validity on old indian passport

Dear Sir/Madam,

I've a valid multiple entry business M type with validity till 22'nd April 2016. I've already traveled once to PRC on same M type. Recently I got my passport renewed and now I have an new passport. Is my M type on old passport still valid if I carry both the new and old passport (with Chinese M type)? The credentials on both the passports are same and passport is simply renewed for next 10 years.