chinese parents denied visitor visa to see new grandson

[pmoyse]

Help!

I have just had my fiancees' parents visa application denied.
We are getting married soon and having our first child this january.
My fiancee has permanent resident status in canada, i was born in canada and have lived here my whole life.
We would like to bring them to canada for the arrival of their third grandchild and our marriage.

We have declaired that we will support them for the duration of their stay.

Her parents own their own house in china, and live near and provide childcare for their other 2 grandchildren.

their denial letter was short and not helpful at all.

Does anyone have any experience with this sort of issue? any advice to give us on how to show that they will not stay in canada longer than their visas?
her father dosnt even really want to come for long... he hates travel ... we just need to show that they will not stay
i have no idea how to go about that

Please help

Thank you