If I book a multi-city and am only staying for 2 days, am I eligible for the up to 72 Hours Visa? I

Hello,

I will be traveling with a multi-city ticket. I will be flying from Seoul, South Korea to Beijing International Airport, then onwards to Canada. I would be in China from April 9 in the morning and departing April 11 in the evening. I am a citizen of Canada. will be traveling with a friend from the United States would this be the same for her. Please let me know. Thank You.