So, that pisses me off.
Common sense dictates that Canada has no means or ability to grant divorces to marriages that occured in another state. I like to think we are that awesome, but reality is, even in Canada, the provinces have to grant divorces. A court in Nevada cannot grant a divorce to two people married in Ontario. It's the same for an Ontario court and Hong Kong.
To have a person who is representing himself as an immigration (consultant / lawyer), and not knowing that very, very simple fact is FRAUD. So you pay out the money to file ... well anyway..
The lawyer will just need to indicate they are representing your partner in Hong Kong for a divorce filing. If they can give any type of time line so CIC knows how long to suspend processing that will be helpful for you as well ...