UK Resident Temporary Working Visa to Hong Kong

Hi,
I am a UK resident and working for a UK exhibition company and we are contracted to build an exhibition stand in Hong Kong for a show. We have employed a Hong Kong based exhibition contractor to build the stand but i will be travelling to Shanghai to oversee the build alongside the HK contractor.
Can you advise on what entry permit i will require and the steps to take to work in Hong Kong.
I will only be in Hong Kong for a maximum of 2 weeks.
Thank you
Hello again.
Sorry, i meant travelling to Hong Kong, not Shanghai.