Do I have this correct?

I have 2 air tickets,

Toronto - Beijing (Round trip) (I will be taking a tour that ends in Hong Kong, then I will be flying from Hong Kong to Kathmandu and doing a tour in Nepal)

My second flight will be from Kathmandu to Beijing to meet up with my international flight. This flight has a stop in Guangzhou for 3 hours...

Will I need a multi entry visa for this whole trip or will I qualify for a free transit in both Guangzhou and Beijing? I will not be leaving the airport in either city and my connection for my Beijing flight is about 6 hours.

Thank you!