There are a couple of issues to this. The main one you'll need to overcome is Foreign Investment Review Board (FIRB) approval. Without it, the company won't be able to purchase. There's an overview of the regime here:
Residential real estate – overview [GN1] – Foreign Investment Review Board
Approval depends on whether the residence is 'new' or 'established'. In most cases you can only get approval for new dwellings. Some of these can qualify for 'pre-approval' (which the developer arranges by getting an exemption for developments of 50 lots or more).
Then, to actually register the land, the company will either need to be registered with ASIC as a foreign corporation or provide sufficient identification of registration in Hong Kong to establish legitimacy (translated into English if not already in English).