Hong Kong Dependants Visa

I am British and I have just accepted a well paid Director position based in Hong Kong. My partner is a Thai passport holder and we have 14 month old daughter who holds a British passport. We have been together for more than 5 years and have several documents to prove this including previous joint rental agreements. Can I apply for a Dependants Visa for my child and partner? If it is not possible can I apply for a long Tourist Visa (180 days) for my partner and renew this as necessary? Thanks in advance for your advice.