Is the layover or final destination counted towards 240hr visa-free transit? Or do I need L Visa

I am Canadian, I was planning on flying into Hong Kong for four days, and then mainland China for seven days. So my trip would be Canada --> Hong Kong --> Chongqing --> Beijing and then back home to Canada.

But on the way back to Canada is a 2hr layover in Hong Kong. Does this mean I would not be eligible for the 240hr visa-free travel?

I thought the Hong Kong layover would not be counted as part of my travel itinerary since I am not getting a hotel there or leaving the airport. Now I think I'm wrong and I will need an L visa for just this layover.