Any other necessary documents needed to enter Hong Kong

I think your return air ticket is necessary, since it can be used as a proof of your duartion in HK. At the same time, financial proof of enough funds for your stay in Hk without working may be also required.

Further to your answer dated Mar, 12, 2012 on Financial proof.
What kind of documents do we have to produce as our financial proof staying in Hong Kong other than my MasterCard and Visa Credit Cards. For your information, our stay in Hong Kong (Ground Package Itinerary) throughout my stay was arranged by our local travel agent in Kuala Lumpur. We only purchase airline tickets from Airasia by ourselves. Do we still need any proof of financial status?. Kindly explain clearly to avoid being stopped entering Hong Kong. Thanks.

Financial proof are such as your bank statement, tax receipt, savings accounts passbooks, etc. If your take part in a tour organized by a international travel agency, I think no need to provide financial proof, since you have paid everything for the trip to the travel agency, right?