Do we qualify for the 144 Hour twov? Family traveling from Canada -> Hong Kong -> Beijing -> Canada

Hello,

We have booked a family trip to China. We are from the US but leaving from Canada (driving). We live in Seattle but are driving up to Vancouver airport. This is our itinerary:

Canada -> Hong Kong (3.5 days)
Hong Kong -> Beijing (3 days/76 hrs)
Beijing -> Canada

Please advise if we need to get a Visa or if we qualify for the 144 Free Transit. And if we do qualify, what do we need to bring?

Thank you, Joann